Mine came yesterday.
Seems like I had a unique issue, where the initial boot-time personalization routine for time and network setting fails and crashes. i could not log in to the normal launcher environment at all.
I called viewsonic, and they suggested I speak with Woot for an exchange. While I was waiting for Woot to RMA me, I went through the VEGAn installation instructions over at XDA. Took about an hour to get all of the pieces together and working. I had to use a Linux virtual machine to work on the filesystem on the gTablet.
Now, my gTablet is running VEGAn 5.1.1 and it is very snappy. I have full market, launcherpro, GApps, etc.
The device is quite heavy, and does indeed had some terrible viewing angles. I read for a couple of hours with it last night, and played som YouTube videos on it, and it is very fast compared to my Archos 70. The Archos is less than half the weight, however.
i'll be interested to see if other Woot purchasers had the same login personalization issue that i did.