Very good cutter from Knipex. It cuts easily everything it promises. The quick release takes a little getting used to, and once you get used to it you work very comfortably and quickly.
Where I think it falls a little short is on small diameters below φ18, because of its bulk and, like all cutters with 4 rollers, you have to pay attention so the pipe goes into the two central ones. For me, the simpler ones with the two rollers work faster there. Personal opinion, whatever each person prefers.
In general though, the tool shaves. Both on copper and stainless steel.
Cheers.