I wear a tooth shield at night, @GroovyGroovy, and it is fine - and better than having my TMJ lock, which is what happens when I don't wear it.
I have 3 veneers - I broke my front teeth in the 1980s, and the composite repairs discoloured.
They have to shave the teeth down, but not to points. The first time I had them done, they didn't cover the teeth with temporary veneers whilst I was waiting for the veneers to be made, and no-one really noticed - I just has small teeth for 2 weeks!
I've had to have them replaced twice since then - only the front two - and have booked in to have them replaced again this year. Each time it has been because I've chipped or broken one, and the other one of the pair needs to be done to keep them looking good. My third veneer is being replaced along with the others this time, as it is still bright white like my teeth were in the 1980s, and my other teeth and veneers are slightly less so.
My front 2 veneers don't look fake - they match my other teeth perfectly. I also think it's a mistake to go for bright white, as they look so fake. Mine are the teeth of a person in their late 50s, and my veneers will match them.
Having had veneers for so long, no way would I have them out of choice though. I have a terrible bite, and so my front teeth don't meet, which actually protects my veneers. I never eat using them - I don't bite with my front teeth, and use a knife and fork for all foods (sandwiches, pizza, EVERYTHING). And even so, I've broken my veneers three times over the years. It's a faff I'd rather not have.