I have a oneblade, it came with my multigroom 9000 series but I've never used it. The prospect of needing to replace oneblades every so often compared to my trimmers clippers with no such requirement puts me off.

I will consider testing it out for science, particularly if your aim is for wet shave level facial hair length.

I know it's not an EU rec but there's this Canadian company called Henson which make a safety razor handle that is more effective due to how it angles the razor blade relative to your skin: https://hensonshaving.com/