My daughter tried to persuade me to install a smart meter, she had one fitted last year. I told her I didn't see the need, I keep a spreadsheet and take regular readings, so I know within pennies what my bill will be every month.
Called me an "Old Luddite" (and worse) and claimed her energy bill had reduced a lot since installing one.
She called me today to say her "smart" meter had failed to include electricity usage for past 4 months and now has a back-charge of round £350!
Also, stop energy supplies claiming smart meters are free, everyone's bill includes a charge to cover the rollout (estimated £10bn-£13bn for 30m homes).