We had to sign with a private dentist when we came to Yorkshire because there were no NHS dentists who'd take us - their books were all full.
The private dentist was okay, although perhaps a little too keen to tell us about his latest ski-ing holiday or safari trip. That smarts a little when you know there's a big bill coming that'll contribute to his next trip - that I couldn't possibly ever afford.
What annoyed us about him was that Mrs Uncle Phil has very tough teeth, never needs anything more than a check-up. I've had trouble with wisdom teeth growing the wrong way and needing extraction, and a couple of small fillings. So how come SHE gets the pressure to sign up to an insurance scheme that'd cover all her costs, and I don't? When, based on our dental history, I'd get the most benefit from it? Answer: because if I keep claiming, there's less in it for the dentist.
We've since been accepted into a practice that only does NHS work. It's all young, newly-qualified dentists, who stick around for two or three years and then, presumably, move onto better and higher (-paid) things, but they seem competent. There's a kind of pile-em-high, sell-em-cheap ethos to the place, but it seems like no-nonsense straightforward care and treatment with no pressue to have hygeinist appointments or anything that's not necessary.
I broke some teeth in a collision a few years back. One of the broken ones started to wear a hole in my lip, so I asked if it could be fixed. The dentist put some acrylic on it to round it over, and said 'this probably won't hold more than a couple of months, but it's guaranteed so come back when it drops off and we'll do it again'. It dropped off, they did it again. It dropped off again and this time he just filed the broken stump so that it wasn't sharp (no cost) and it's been fine ever since.
I'd never have metal fillings. Putting a mixture of heavy metals permanently in your mouth, so that you're chronically exposed to those heavy metals.... I know enough toxicology to know that doesn't sound like a good idea.