Dh and I have just signed up to - and been treated by - an NHS dentist. My treatment (3 minor fillings) cost c£60 (three appointments: check up followed by 2 appointments for the fillings) whereas dh, who needed a lot of work done (2 caps at the front replaced, some fillings and 4
extractions at the back he hadn't been since before Covid
) was c£200.
Dh is really apprehensive about dentists and really hates changing, but our previous one had retired and although the practice that took over still also did NHS work, it wasn't in as convenient a location as we normally longer worked in the city centre. But he really likes the new dentist too 
Dentist was encouraging ds and his girlfriend to sign up - especially as it's completely free for them until they're 26 
There are other NHS dentists with good reputations in the vicinity 
We're in Glasgow though and the state of Scottish NHS dentistry doesn't seem quite as dire as in England
- although I know there are still some locations where there are problems
).