i had one for nearly 4 years, and then went to regular gears. the ‘hoff was great, and i enjoyed having it. it also saved me a chunk of money during uni, which would have been spend on chains/mechs/chainrings/cassettes/cables etc. so definitely a positive experience – 1 set of cables and one chain was all i bought drivetrain wise throughout university.
i kinda fell out of love with it on long alpine climbs, where (despite it being only a small loss of efficiency) i found it frustrating. as it happens, i now live in the alps, and as such i get a lot less crap weather (skiing in winter anyway), and a lot of climbing… so i’m happy to have got rid.
still, i think its a great bit of kit, and in the right situation, on the right bike, i’d have another.