One caveat with the Stripax-style strippers, especially the Knipex model I suggest above: the blades are fairly delicate. DO NOT strip anything but copper wire with them, DO NOT attempt to strip wire larger than the maximum, and DO NOT let kids or careless adults play with them. I’ve seen new blades get ruined in under a week by careless people who play around with tools and clamp down on steel wire or a component or whatever “for fun”.
In the hands of a careful person they’ll last a long time.
Knipex Multistrip 10 looks similar to Stripax on a first glance but is not even close (I own both). Total trash which is often sold for more than Stripax. Complete waste of money. I suspect their newer PreciStrip16 may be OK by its looks and considering it's adjustable but would not take chances spending money on Knipex stripper.
I double checked at work and the one I had at my bench (“had” because yesterday was my last day there) are the 12 42 195, the MultiStrip 10, and I preferred it over the Stripax. Not that either one worked well on PTFE, irradiated PVC, etc. But for normal PVC, it worked well, and without the risk of damaging wire like a Stripax with the depth set wrong. (When working with trainees, they often forget to adjust a Stripax.)
What are the issues you have with the MultiStrip 10?