Its been almost 2 months that I've used the Boost TC on my FH, and I feel obligated to at least give a review of it before I switch over to the Nimbus Medium.
Played on the Yin-he M-6, which is similar to an old school clipper.
Initial Physical Inspection
Nice grippy topsheet, completely non tacky, its got that nice glossy shine to it when viewed from an angle. Sponge is soft, softer than anything I've ever used...it is around Tango hardness, and even Solcion is harder than the TC. Overall the rubber is also very light. I'd say it weighs in the high 30's for a cut sheet.
Hitting/Blocking
Hitting against topspin is beautiful, the soft sponge ensures each ball is dug well into the sponge and produces a beautiful arc. The TC is also quite a fast rubber (surprisingly) and so with each hit, you have the perfect combination of speed and spin. Hitting against backspin however, is atrocious. The ultra soft sponge doesn't give enough support for the hard contact required for this stroke and often bottoms out if you are not careful. A coach looked at my technique and wondered why I couldn't hit against backspin and claimed the TC to be "spineless".
Blocking with the TC is a two edge sword. On the one hand it is soft and has nice speed and arc, which is good for semi-aggressive block. On the other hand, TC invites heavily spun balls (like those of the infamous Tenergy) to have tea inside. The dwell becomes its weakness here, the ball immediately sinks deep inside the sponge, and you're forced to close the racket to ridiculous angles just to get the ball on. Also, since the sponge is so soft, it cancels out some of the spin and most of the speed...hence all that adjusting for nothing.
Serving / Pushing
Coming from harder rubbers such as Sriver and Higher, serving really isn't something TC can be proud of. Yes, spin is adequate...but completely negligible without a fair amount of deceptive motion. The reason huge amounts of spin can't be produced is because as if you're making thin contact with the topsheet, you can only go so thin before it slips...the "normal" solution is a higher ball toss and hit harder on the serve. While this works on H3 and the like, TC's ultra soft sponge comes to work and shoots it off the rubber before any significant spin is put onto the ball.
Again, pushing with the TC relies on your ability to deceive (ie, pushing to various places with the same initial racket angle). Oh it can produce heavy pushes, but doing so requires the perfect stroke.
Looping / Counterlooping
Looping and counterlooping off topspin is very very nice. Probably THE reason to choose TC. It feels like the very old Tango Extrem, that bites the ball so well on each stroke...while maintaining good power. The best part about it is the arc, it has such a beautiful text book arc that makes you want to hit harder and harder, knowing it'll all land.
Loop-killing off backspin is horrible...same reasoning as hitting backspin. But opening loops off backspin is very easy to do, although the spin is so-so, but you can manipulate the arc and open with a very short loop, then wait for the counterloop
Conclusion
I would recommend anyone thinking about this rubber to use it on some form of composite blade. It would certainly make killing backspin much easier. Apart from its weakness against backspin, it really is quite a unique rubber. It has the brilliant glue feeling of a soft tensor, the speed of a medium-sponged tensor, the short game of a hard-tensor and the durability of a Sriver. That's gotta be a win. ahahha
