A short review:
My style is mainly forehand loop/drive, backhand block/drive. I'm using the 1.8 "Thick" version on forehand and backhand of a 5-ply wood blade (walnut-spruce-ayous-spruce-walnut). I hope to try the 2.0 "Super Thick" version in the future.
Coming from H3/H3 Neo, G-1 feels like a faster version (like boosted). It does not have the strong catapult of Tenergy or MX-P, but has the higher throw, so the looping arc is better than MX-P. G-1 has the spin and consistency of H3/Neo, and yet the loops are fast and piercing like MX-P. G-1 does not have the spring sponge of Tenergy, so you need a full stroke. The sponge is hard and linear like Omega V Asia. But although the sponge on my G-1 is 1.8, it is faster than OVA max thickness.
Among modern rubber that I have used at least for several weeks (H3/Neo, T80, OVA, MX-P), G-1 has unexpectedly become my favorite of all. But this is with one week of play (5 sessions), so I also have the least experience with it, and do not really know how durable it is. It's my favorite because I need little adaptation from H3, so my shots are extremely consistent and predictable, yet it's more dangerous, and I am winning games against people I often don't win. I have never hit so many winners ever since using G-1.