5'7, 345lbs, male - I rode Mine Train on Saturday. I fit (not comfortably) but I fit. The seat itself is very small - I should have emptied my pockets because I almost lost my glasses and wallet. Do I have to ride it again? Not at all. As others have said - it is very lackluster and we kept stopping every few seconds (no reason why). Luckily I had a FP+ as the waits have been 60 minutes plus since arrival (I only waited about 5 minutes at 3pm). I honestly do not remember anything memorable from it - it was just very lackluster.