I got a thermostatic shower mixer from ikea and it's awsome. Just set your preffered temp and it will make sure it stays that way. It wasn't even that expensive. I wish more people knew about it.
Europe is not one homogenous continent. Here in Europe where I am they are not common, and I've been to at least 2 other countries here in Euorpe where these mixers were not common.
Okay fair point. I think I've seen them, not everywhere mind you, but certainly encountered them in at least twelve countries here in Europe. So they're certainly wide spread.
I found cheaper options too, but decided to go with ikea because they offer replacement ceramic cartrige which is apparently the only thing that can break on these mixers.