Here are some things that I've noticed over the time I've had it.

I originally purchased two, 64gb w/ touch and 32gb plain. Amazingly the experience has been somewhat different between using the two.

The screen quality/color is different between the two. When set side by side, the 64gb has a slightly warmer, or subtle yellowish tint. Where as the 32gb seems to have a more vibrant or cooler screen. Side by side, the 32gb seems to have the better screen.

There have been some kind of update along the line that allows 3rd party hardware apps to be installed - specifically for printers. I did a complete refresh of the 32gb and once everything was set there was a Canon app installed for the printer. I had to manually install it on the 64gb. It gets better. With this app, only the 32gb sees the printer whereas the 64gb spits out connection errors. Yet, I can still print from both slates. Go figure.

The 32gb has noticeable lag - the tiles take a moment to load - when scrolling fast through the store. Hardly any such lag on the 64gb.

Wifi is fairly stable on both, but the 64gb seems to lose connection more often.

The Windows button only works about 50% of the time on the 64gb when trying turn the screen on or taking a screen capture. Have had hardly any problems w/ the 32gb.

MS still has their work cut out for them to make the UX better overall.