I have been using surface RT for the past month, all i can say is it's good but not perfect. First thing about the good is the hardware, it is awesome. Second is the desktop and productivity, it just wows people when they see me able to go desktop on such a small device.
But then the bad thing is that all the apps r mostly terrible. The xbox music is slow and buggy, all my zune subscribed musics (DRM protected) can't be played for weird reasons until i have to fix it in the registry. The microsoft store is terribly slow, i spent 30 minutes trying to setup my payment method when it just keeps round loading circle, then i gave up and restarted my surface to have it working. It shows 5 apps need updating but when clicked loading again. Have to restart for it to work. Now for games, it sometimes just crashes and can never relaunch until i restart the surface. All i do with this device is RESTART RESTART RESTART RESTART.
Also, my charger died on me the other day. I did the service order but 2 weeks without news. So i complained and got it few days later. It might be a mismanagement or something but they sent two chargers instead.
All in all, its a great device, i love it. Get it if you dont have a tablet. But i dont think i can recommend it until they fix all the crashing and sluggish issues which are ANNOYING!