I prefer tiling floors to walls, so spend a lot of time on my knees. I believe a replacement knee costs about £5000 (obviously free on the NHS but only lasts 15 years) - £90 on kneepads looks like a bargain - and that's before you consider lost earnings, and you probably wont be able to tile again after a knee replacement. Actually it matters more that you wear something that protects your knees every time you kneel on a hard surface, so even £5 inserts are better than none. Which takes me back to - find what works for you and use that. A few quid and some fun experimenting, but the right pad for you is out there.
I've worn them everyday for over 30yrs Andy, if they're not at work, then neither am I!
You're absolutely correct in your post, I'd just be reluctant to spend £90 for something that might not work for me.
If I could trial them, then I wouldn't have a problem.
I have dozens of worn and failed knee pads in my kit,
It's a minefield for sure.
I must admit I'd like to try the American ones that the names escapes me at the moment, but they are orthopaedic and made to measure.
I think they're pushing around £200.