2.5mm review
The good;
The best thing about this rubber is the confidence it gives me to win with outright speed drives or powerloops from mid distance or further. Even at the short game, if the ball is returned to me just a little high, it's the end for the opponent. This rubber wants to kill with speed, and that fits my game style.
Next best thing, the feeling. The standard 'spring sponge X', with it's satisfying clicky feel, is further enhanced by making the sponge thick and giving the rubber a very thin topsheet. This allows players to engage and feel the sponge even more. When mid distance powerlooping, the feeling is one of its kind and out of this world. If you like the non tacky catapult feel, then this is the best you can get.
Thirdly, it's hyper grippy topsheet. Try rubbing your fingers without much force on it's new topsheet and your fingers ain't going anywhere. For a non tacky rubber, the grip levels are very impressive. This allows me to focus a lot on brushing with great confidence. Given, this rubber requires advanced thin brushing techniques, but it's high topsheet grip makes me just go for it without any hesitation. Of course D09C wins in this regard, but the Zyre-03 is not far off. If the weather isn't humid, ball slippage is virtually zero.
All this and you probably think, okay the control's gotta be bad. But it's not. Except for the short game (which I'll get to that later) this rubber with it's great feel and not very strong catapult, allows for good control. Granted, beginners shouldn't go anywhere near this thing, but in the hands of an intermediate with decent footwork and good strokes, this rubber can be used quite well.
Durability; 3 months in, 5-6 sessions per week, each 2 hours high intensity, topsheet looks a little roughed but plays like 95% new. At my intense use, I probably play about 40 hours monthly minimum, and it'll probably last me 4-6 months. It's quite sensitive to humidity though, ball slippage is there in humid weather, but nothing a wipe can't fix.
Cons
Price. Enough said. Absurd to pay so much for a rubber. If you want premium but don't wanna take a bank loan for a rubber, consider Dignics 05.
It has low dwell. If you want to spin the ball through sponge engagement, you must loop real hard to get that hard sponge to deform and meld into the shape of the ball. If you can get there, the ball will spin like a neutron star. But if you can't get there, then your only hope is thin brushing.
Short game control. It's mainly to do with spin anticipation. This rubber is quite sensitive to spin (but not as bad as T05). So when opponents serve short backspin sidespin, you really need to get your racket angles right to avoid springing the ball up. In this regard, D09C far outweighs it in short game control.
Overall
Good rubber, but get it 2nd hand from a player who bought it new and used it for a few weeks, then felt it is too demanding for them. I prefer the 2.5mm.