All providers will be replacing traditional meters with smart meters by 2020, so there won't be a choice in the matter. Having been embroiled in a lengthy, Kafka-esque dispute with EDF over my electricity usage a few years ago, I would much rather have something in my home that showed me the cost of the electricity. When I asked British Gas to install one last week I was told that they weren't in a position to change mine - presumably because I live in a flat.