I've been using my mostly in portrait mode and it's fine. IMO, the screen quality is better than my Galaxy TAB. I don't care about the view angle, with my thick glasses anything other than headon is iffy.
I just hope that NVidia continues with product development because from what I've read the G Tablet is no longer being produced.
I had some issues with installing the ROM. Apparently, my G Tablet was one that had the wrong partitions. I had to NVFlash it back to original stock, get the OTA update to 3588 and then install CWM .8 and then VEGAn Gingerbread.
I sold some of my other gadgets to get this and I like reading on it.