I have a Cube U9GT2. Unfortunately, due to the RK2918 processor being a bit underpowered in the GPU department it doesn't hold a candle to the iPad 2 as far as gaming goes. The best tablet for comparing to the iPad 2 right now is the Onda Vi40 Elite. The screen is just as pretty as the one in the U9GT2 and the A10 processor does significantly better than the RK2918 processor. I like the build quality on the cube a bit better and I think the battery life is better (I need to test this) but as far as the gaming performance goes, A10 all the way. I will release a full comparison review in the coming weeks.
The iPad 2 is still the better device for the majority of things but it is also $100 - $300 more expensive. I am not a Apple fanboy in the least. If I had lots of money I would spring for an Asus Transformer Prime if anything.
My 2-Cents,
Roman
http://www.topnotchtablets.com