I live in Nottingham, used to live in Sheffield. I’m not a fan of them.
They are a nightmare in the rain. The layout in some places make it impossible to cross them at right angles, and whats worse is the left hand rail is often exactly where you want to be on a bicycle, so I ride in the middle of them, which in turn annoys idiot car drivers/leads to some really stupid overtakes, often with a tram in the other lane.
Also, pedestrians around tram stops are complete lemmings, just wandering out into the road from behind trams or without looking at all.