Don't buy it. Good enough? No seriously though, if you can wait, I think the Transformer will be a far and away better investment. Especially if you plan to get the keyboard like me. Added battery life, ease of a keyboard, more ports, practically a netbook with all the android goodness. Plus there's the fact that the g-tab needs roms, rooting and xda support/mods to make it good. The Transformer will work very well without any tinkering. Asus > Viewsonic....and uh, most importantly maybe, the screen. I had a g-tab, sure the screen is fine if you are looking right at it and there's not too much light. I don't know how the Transformer will be, but even indoors I was having issues seeing my g-tab sometimes. I sold mine for $300 with a case, before the prices dropped even more...thankfully! Point being, why have the hassle when you can get a 3.0 tab for about a 100 more
BTW, i'm not opposed to rooting and tinkering, but it is nice to not have to and have boot loops trying to get a good rom on!