My son has smart meters, inherited when he bought the house, never work.
Daughter was going to have them fitted. Electric OK but they couldn't fit the gas one, had to move the meter then still couldn't fit it.
I have been with Scottish Power for decades and never had a single problem with them. I began taking my own meter readings on the 1st of each month and submitting them, never a problem. A couple of times a year they ask for a reading in the middle of the month, don't know why but it is a simple enough task, takes all of five minutes.
Reading my meters multiple times a day to see what the impact of solar panels has on the consumption, seems to be considerable.
Resisting having smart meters fitted until I can be sure they are beneficial for me rather than SP.