I had an SP3 i3 that refused to boot to Windows, and then my replacement i3 kept freezing up, so they replaced that one as well. There was nothing wrong with my 3rd i3, I just decided that the i5 would suit my needs better, so I made an exchange. That was 2 weeks ago.
I bought the Microsoft Complete warranty, and a purple type cover as well. I also got a bluetooth speaker and a Micro SD card. I have been waiting for something like this for a very long time. This device is very unique, and I think it would be a shame if you didn't give it a fair chance.
Despite the minor problems, I still love my SP3, and really wouldn't want to be without it.