Okay, its been a while so I'll provide an update on this all. I played a full set with Racket 1 and even several days later the tension has barely dropped. Same story on Racket 2 after no play on it. So, tension maintenance on this string is excellent. Comfort is much better than Cyclone.
HOWEVER, I have definitely noticed less pop and control after extended use. Enough that I had switched rackets completely during a match (something I never do) because I was missing shots that would normally drop in. After switching rackets (to my standby racket from 30 years ago...strung with syn gut), things got back to normal. After the match, I decided to try the Tier 1 FW Boost in my old racket (Prince CTS Graduate 90) strung at 52 lbs. After 4 sets with this combo, tension dropped 12.4%. In general, playability was fine but I didn't experience any more spin than with syn gut.
So, this all said, I think that Tier One FW Boost is a good string, with the following attributes (in rank order):
- Tension maintenance
- Comfort
- Value
- Spin potential - perhaps dependent a bit on the racket
It is low-powered IMO (which is fine) but the small change in directional control I experienced had enough impact for me not to consider this string as my current favorite. I was hoping the result would be different as the value of this string had the potential to rival similarly and higher priced strings. I'll continue to experiment with it (still strung in my 2 Pure Drives and one CTS Graduate) but I am now going to try full bed Cyclone 18 awg in one of my CTS Graduates and see how that goes. I have 3 more matches this week so I'll definitely be able to compare the Cyclone and FW Boost back-to-back in my old rackets.
PS - I am thinking about ditching my Pure Drives and reverting to the Prince rackets from my High School days. I have 4 of them total and they play great...