We moved to a bungalow 3 years ago (2 adults and 1 (very expensive teenager !!!) - the water meter was already installed (outside front drive) by the lady who lived here before.
Unfortunately we have found our bills to be much more costly.
I think a water meter is fine for say, a pensioner or a person living on their own, but for a family, the bills are much more dearer.
It makes me laugh, when you see adverts for saving water, advising that having a shower is cheaper than a bath- this may well be true, but you can only stay in the shower for a minimum of 5 minutes, it takes me that time to get the top of the shower gel !!!
Once the meter is installed, you cannot have it removed.
No - I don't think they are a good idea !!!!!