I considered several options, but ended up buying the fronts and hinges from IKEA.
An easy and cost effective way of doing it.
I did however decide against using the entire cabinets. My reason are:
1) Measurements. I wanted different depths. I could of course cut the IKEA cabinets, but that is work to.
2) weight and ridgidity. Especially for the wall cabinets, but also for bench cabinets you can save weight and reduce the load on fastening points by making your own cabinets. When using IKEA cabinets you end up with double wall between each door, for wall cabinets you will also get a top plate and rear plate which is not needed, since the roof and wall can fill that function. For a bench cabinet the bottom and rear plate are not wanted, at least not in my case. You can also choose some stronger materials to improve ridigty.
3) Moisture. The IKEA cabinets do have some "non covered" plate edges, and the boards they use do not like moisture.
Ended up making cabinet skeleton in glulam, letting the sides facing walls or ceiling beiing open and covering only the sides need to be covered.
Skeleton:
Hope this made sense