This is probably my favourite rubber. I tried a lot of stuff, like tensors, chinese rubbers, but when I go back to G2 FX I always play better. The point is the rubber isn't really the best in anything, but it's very good in everything. And it's also very easy to play and play competitively.
I used it before in the backhand of a Cpen blade and love it. Now I changed style and use it on a Jpen blade (Darker Speed 70, 10mm). I picked a 2.1mm instead of MAX thickiness. Max doesn't give much touch compared to 2.1mm. And speed is not a problem since my blade is very fast.
Weight is another good from this rubber, it's very light compared to Bryce, Sriver or Mark V.
I don't see any cons of G2 FX if you use a fast blade. However, if you pick a light, 5-ply soft blade such as Extra or Allround Classic, this rubber might not give power enough on high speed exchanges.
I highly recommend G2 FX to any player who wants to play consistently. Sure I will buy it again.

A low throw, soft, light rubber that's not super fast, but definately enough to put the ball away. Excels in passive play.

Great all-round attacking rubber with a bit more pace than the traditional Sriver family.

Medium-soft feel with low throw and great control. Good mechanical grip for loops, nice feel on blocks and flat hits.

Suits most blades, but lacks outright speed so proably a better fit with faster blades if you're a power attacker.

If you're looking for a rubber that's a step above normal rubbers but a step below tensors this is a good rubber to use. It plays like Sriver but has more oomph. Loops well, counters well, smashes well. Basically like a tensor minus a little speed, and with better touch. Highly recommend this rubber if you want a step up from regular rubbers and a rubber that's controlable.

my favourite rubber. spin, control, durability are good. it is way better than sriver g2.

Good rubber,

Very good rubber for anyone who loops with more spin than speed. Still not slow and with a good technique you can easily hit you opponent off the table. Touch and short game are good aswell.

Shame about the price being a bit steep, thats why I give it 9 and not 10!

exellent ruber for service,topspin,loop... spini...exellent fantastik in my blade TBS

This is similar to Sriver but I agree it definitely has a lower throw angle. Regular Sriver has a much higher throw, and this rubber doesn't really do anything that regular Sriver does, maybe just a little more speed. For the money should skip this any try Cermet or Tenergy.

A very good rubber!!!!

low throw angle. not very good for blocking. better if u want to loop spinny but its not easy if opponent gives u a lot of backspin.

Pretty disappointed, its throw angle is very low compared to Sriver FX and loops are not as strong, its not as fast as Butterfly advertise. Similar spin characteristics as Sriver.

Great product for overall play. Good spin, only a bit less than Tenergy, but at half the price. Combine it with fast blade like tbs or alc.

This is first rubber that I used on a ALL+ J-pen for about 2 months. This is good rubber for looping and spins. A little less speed and spin than tenergy but tenergy might be too fast for some people (especially a beginner).

I posted a review on this rubber here:

http://tabletennisonline.org/inverted-rubbers/butterfly-sriver-g2-fx-review/