I bought the 2.5 mm Zyre 03 which I use for my forehand. It is already just as fast as my old fast Butterfly Bryce rubber which I used to speed glue many years ago.
I glued the Zyre 03 to my new Butterfly Ovtcharov Innerforce blade.
As I mentioned when reviewing the blade, my flat hits (of high balls) are crisper than with what I used before. Therefore I no longer try to loop higher balls and instead get more winning points with flat smashes as a result.
I do have an Omni S-Pro Pongbot and find looping against top spin from about 6 feet and against underspin from 2-3 feet from the table is easier than before. I am trying to adjust my club game to play further from the table, hoping to force my opponent to defend against my fast top spin game. However, with both the Zyre 03 and Dignics 09C (back hand) my blocking (with racket mostly vertical) of fast shots at the table is effortless and I don't have any control problems near the net that some reviews warned about.
Next time I will likely get the 2.7 mm Zyre 03.