I purchased this computer/tablet last year; I have barely used it. All I have done is loaded a few pictures. I am not the most technologically advanced person around, especially when it comes to microsoft; I haven't used microsoft since I retired 8 years ago, and with the new version I'm totally lost. It's hard to teach an old dog new tricks. We are an Apple family, so I'm familiar with it. Recently I purchased a Mac Pro, thus the Surface RT can go; it wasn't being used anyway.
I would venture to guess that I used it 3-4 hours at the most.
Here's what I paid for it:
$346.49 Surface RT
$ 41.99 screen protector
$ 89.99 keyboard and cover
$ 23.92 tax
$502.39