I've got a Pi-Top, a laptop built around a Raspberry Pi. It's the 
first model, crowd-funded. I wouldn't recommend it. I had very little 
time to devote to it but noticed the keyboard and the touchpad are of 
poor quality. Another aspect is that it is more a test bench than a true 
laptop. The USB sockets are on the raspberry Pi and not easily 
accessible from outside; you must open a sliding door between the 
keyboard and the lid to reach the Raspberry Pi, a door meant for 
hardware hacking in some sense.

     OTOH, it is supposed to have an autonomy of 10h on battery...

     Didier