Should I upgrade my Surface Pro to 8.1 preview?

I'm pretty satisfied right now with my surface pro (waiting for the type cover to arrive :P), but I'd like to get 8.1 as soon as possible, so I'm asking if the preview is usable enough

  • are there serious/frequent bugs?
  • is it snappy as before? I heard the preview had some hiccups, are those frequent?
  • is the problem with games and scaling fixed? (the fact that you had to set resolution to 100% instead of 125% to play games without mouse issues?
  • related: how's the scaling handled now?
  • are the improvements worth it?
  • will I have to do some kind of reset or lose some data when upgrading to the stable 8.1 release?

thanks in advance for the help :)