I have heard too many bad and negative things about them... From people saying they don't work properly and send false readings (too low or too high,) to people saying they just don't work at all. Some people have ended up owing loads of money as the smart meter is saying they are using less than they are.
Also, I have been nagged and bullied CONTINUALLY by my energy supplier to get one... I have had letters and emails, 2 or 3 times a month some months, for the past 3 or 4 years, varying from 'You can now get a smart meter if you want to, just book an engineer as soon as you like' to YOU ARE DUE A SMART METER, WE ARE IN YOUR AREA SOON. BOOK NOW! NOWWWWWWWWW!' (Which pretty much makes it sound as if we have no choice, and it's mandatory.)
The more they nag and bully me, the more I will resist having one. I will just keep my current meters ta!
Right at this moment in time, I will NEVER have a smart meter. I have no idea WHY they are so desperate for people to switch to one, but unless it becomes LAW to have one, I will NOT be having one. I don't appreciate bullying. It's like when they used to try and force people to have the system flush, and people ended up with a much worse heating system, and noisy pipes, and more problems than before the system flush.
We constantly resisted that too, despite them saying they won't do any repairs or maintenance to our heating system or boiler unless we have one (despite a having fucking CONTRACT with them to do it!) As I say, I don't appreciate nagging and bullying.
When the one engineer refused to do the boiler check (that they were contracted to do,) unless we signed up and paid for a system flush, we told him to bore off, sent him on his way, cancelled the contract, and sent a furious letter to the company telling them what we thought of their bullying and blackmailing. They insisted they did no wrong, and sent a letter back, saying their engineer would never have said that, and would not admit any wrong-doing. We never replied, and we never renewed the contract with them.