Here's my 2 cents:
I bought a lightly used (less than 25 hours) Silent Partner Quest AC/DC from the manufacturer for $1250 on ****. It came with a one year warranty.
1. I warm up hitting 20-30 forehands and backhand ground strokes down the middle.
Then I turn on the 2 line & hit alternating cross court forehands & backhands.
2. Then I alternate forehand and backhands going cross court and then down the line.
3. Then using the same ball pattern & speed I move in a little & hit forehand and backhand volleys.
4. I repeat the volley drill and move in 2-3 feet after hitting a few balls on each side until I get 4-5 feet from the net.
You can program the SP quest for 3 different ball speeds & spins.
My program #1 is a crisp ground stroke with some topspin.
My program #2 is a loopier ground stroke with a bit more top
My program #3 is for overheads.
I go through the above 4 steps with program #1 with 100+ balls and then program #2 with 100+ balls.
Assuming you are using good form the above should help ingrain good ball striking.
Other points:
The exterior oscillation is not a factor in doing the above drills.
I used the machine for 2 1/2 hours without any battery degradation.
The remote doesn't have an antenae & works fine.
I use regular balls.
If you want to do strictly cross court shots you I think you have to move the machine closer to the corner, aim it cross court, and don't use the 2 line feature.
I looked at the Spinfire & might have bought it except it was $650 more than my lightly used one. Also, the SP staff are very good to work with.
I hope this helps.
Thanks. That's great information. I too was going to buy a used 2yo Quest for what I thought was 1/2 price a week ago. After I drove an hour out of town to make the purchase I found out the machine was a lower end model than the Quest. (So, a classic bait 'n switch which they likely knew they were doing as the name of the machine is right on the control panel and they ordered it two years before and had used it since. Also they probably thought since I was driving an hour I'd buy it anyway for the price agreed upon for the higher-end unit). Anyway, they wouldn't accept my revised lower offer for this lower end machine than was agreed upon for what I thought was a used Quest so I drove back home empty-handed (and frustrated!).
I am in Canada 1/2 hour away from Silent Partners assembly factory and it turns out the used and demo machines sold by 'silentpartnerbyauction' every few months on that website that you
enter by the
Bay uses US currency for their pricing such that the used/demo price was within a hair of what I could buy one new for in Canada (with a 2yr not the 1yr used/demo warranty offered). That's because Silent Partner charges orders shipping to people in Canada using Canadian dollar pricing but in the US using US dollar pricing. With a 25% decline in our dollar vs the US dollar since last year this is a huge bonus. (Finally the one time I've found a decline in the Canadian $ hasn't hurt us!).
But, I digress. This caused me to do a full review of all the machines now that I was going to buy a new machine as no other used machines were available other than the ones Silent Partner was selling. The Spinfire Pro 2 is priced at only 17% more new than a new Silent Partner Quest in Canada and for that I get internal oscillation, a remote (actually a new antenna-less remote of a new design which is being released shortly) and the capability of a removable battery as Spinfire now offers an external battery option (on their recently revised model) in a carrying case that does not require there to be an internal battery present. There is also an AC option. That provides a number of advantages. It makes the machine 6kg/13 lbs lighter, so 18kg/39 lbs without the battery vs 50lbs/23kg for the Silent Partner Quest, makes it easier to lift in and out of the car when you go to the court, allows you to leave the machine in the car and only bring the battery in to charge and allows you to not even bring a battery to the court and just plug the machine in using the AC adapter if there is an outlet there. Also, if you purchase the machine with the internal battery installed you can later buy the external battery pack and carrying case without the battery itself and remove the internal battery and install it in the case. I don't know if Silent Partner Quest (or Rival/Smart) is upgradable like this if you buy the battery-only machine as they sell 3 different versions (DC-only, AC/DC and AC-only) but I know they do not have an external battery only option. Actually, Lobster has an external battery option but you have to have the internal battery present too. That's a disadvantage as the weight of the machine is not reduced. Lastly you can buy the AC adapter later for the Spinfire (and use it with any of the batteries present).
Spinfire has really thought out their machine design exceptionally well as all of these options are available on the one machine. You can buy the machine with either the internal battery, no internal battery + AC adapter, no internal battery + external battery or internal battery + external battery + AC adapter. Also, you can add any option later. If you buy the machine with the internal battery only you can later convert it to the external battery version youself by just buying the external battery housing and carrying case and installing the internal battery in it. You can buy the AC adapter at any time to provide AC power.
I did have to think long and hard, though, about not having the extra programmability that the Quest has (drill-mode and match play mode) but decided they were more of a nice to have than a need to have. Spinfire's 1-line mode with or without vertical oscillation, 2-line (narrow, medum and wide) drill mode all with or without vertical oscillation, medium or wide mode with horizontal oscillation and also with or without vertical oscillation (ie triple/all-court/3D mode) and all with optional topspin/backspin are enough for me. Silent Partner has excellent pre and post-sales support but so does Spinfire. So, the advantages of the Spinfire Pro 2, mainly external battery and internal oscillation, outweighed that extra programmability for me. The fact it's a really nice looking machine (far nicer than the Silent Partner's old-school design) is a bonus but had no bearing on my decision.
Once I receive my machine and have been using it for a while (likely mid-summer) I will be posting a very detailed full review of it on here.