I have those extruded plastic panels on the walls and ceiling, and vinyl floor laminate (like the wood-look stuff, but slate-look, and suitable for bathrooms)
I like it. It was so fast to put up over the existing tiles, it's easy to clean, it was cheap, and it's warmer than tiles.
The floor stuff is fantastic too - easy to clean, easy to fit, and again, warm.
The downside is things fitted to the wall do need to be carefully done, because you are fitting them over extruded plastic, and when you get up close, you can see the printing, which is a bit odd.
You do need to make sure they use all the right corner/bottom fitting bits around shower/bath too (we had an issue with a leak, which turned out to be because it had been fitted wrong)
The fitter (it was his first time doing it) did worry about it getting easily damaged, but it hasn't been our experience - it's not like I'm swinging crow bars in the bathroom!