I've had a Synergy 98 since April. Didn't much care for it at first. Sweet spot seemed small. The standard weight, but with higher end swing weight felt a bit off, especially on serves....However, about midsummer I pulled it out again and began to realize its charms. If you allow your strokes to flow, the swing weight just comes along for the ride and adds some nice umph to your shots. Trying to "arm" your shots the racquet will just work against you. Same with the serves; I couldn't muscle through the motion, but allowing the added swing weight to ensure a good pro drop on my arm action, and then that weight coming through the ball gave me some very nice serves with rather good spin as well. On ground strokes, the perceived small sweet spot made me KEEP MY EYE ON THE BALL all the way through contact, and now the racquet feels quite forgiving and the sweet spot feels rather large actually.
It certainly is a unique racquet in string pattern, swing weight and flex. What I have found is that the more I play with this racquet alone, not switching around to others in my bag, the better it plays for me. That's likely true for most racquets, but I feel that this stick doesn't get the recognition it deserves because perhaps many don't bother to give it a long enough tryout.
At one point I tried to even out the swing weight by adding weight to the handle. Racquet just ended up feeling sluggish. I removed the handle weight, played it stock, and that's when I began to get a groove on with the stick. The design concept of a 305 racquet, so it is physically light in your hand, but with enhanced swing weight for good plow through really caught on with me. I'm not a heavy topspin player, and tend to hit through the ball. But the shots with the racquet aren't what I would deem "flat shots". The 18x18 strikes a nice balance between control and spin. The 18x18 may be a gimmick of sorts, as it looks as if they could easily have put in another couple of crosses. But perhaps leaving the borders vacant of strings is what helps give this racquet such a nice pocketing feel. Nobody is hitting useful shots off of the crosses at the very tip or throat anyhow, so just leave them out I guess. Oh, and stabilty- yes this racquet feels very stable. Comes right through the ball smooth as can be. Sure, any racquet returning a blistering serve will get blown off axis from time to time, but it is a rare event with this racquet in my experience.
Last time they had a sale on it I grabbed a second one, and am now using them to test strings and tensions to level up even more. So far, for me, the Volkl Cyclone 17g at 50lbs is the winner. Tried RPM Blast 17g , V-Square 18g , and Black Widow 18g.
Other racquets I've had over the past year or so: Textreme Tour 100P (2019), Phantom 100P, Clash 100, Aero 100 (2016), Head Gravity S, RipStick, Dunlop SX 300 tour.
I love that Prince has been bold in their design concepts. I hope they continue in that direction.