I got an early CraftBot in 2014 so some teething problems were to expect. All issues were solved by CraftUnique by sending me the parts, since the machine is quite well constructed I was able to make the necessary repairs myself. However, the Craftbot sold today seems far more robust I think, and I would definitely recommend it to anyone looking for a solid 3D printer. Preferably the XL with linear rails if budget allows.
I am printing all kinds of stuff in PLA and PTE from different cheap brands, and as long as it sticks to the build plate it just prints without problems. I print on a glass plate held with a few gino pads which is a common low cost upgrade. It is flatter than the provided alu plate which warped a bit for me over time
CraftUnique also develop the slicing software CraftWare, which is pretty solid IMO. It gives a nice 3D rendering of what the objects layers will look like, and it has tons of parameters. Anyhow, you can of course use other slicers with the CraftBot. Finally I'd like to mention the CraftUnique forum where a very friendly community does its best to help anyone running into problems. The devs are also present there hinting about new CraftWare features and stuff like that which is awesome.