I have a Pi-Top v1. The Pi-Top v1 gained notoriety for having its battery dead after several months, a google search about Pi-Top battery problem will surely give you lots of hits. Even replaced batteries suffer the same. As far as I know, there is (or will ever be) a fix.
Wanted to change to the v3 but its not available on my trusted online stores. Probably because of the problems brought in by the v1, the stores are not "risking" on stocking and selling the Pi-Top line anymore.
In my PiTop v1, there is a need to buy an optional breakout board, to where the RPi's GPIO pins can be accessed. As it's price was not attractive I forgo to having one.
Am I still using it? Yes I still am but always plugged to AC adaptor. It has an RPi3B with a 38x38x7 heatsink on the SoC and a sideways blowing fan, native USB thumbdrive boot running latest raspbian stretch with desktop, used mostly for viewing movies on Kodi at bedtime, and checking some online stuff while still in bed.
It will be reconfigured later on for use in CNC machining/3D printing.
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"
Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"