I'm considering getting a few hermit crabs and I just wanted some advice and information from some hermit crab owners. I've researched them so I know pretty much all I need to know about how to take care of them but...I wanted to know some stuff only owners would know. Like, are they an overall enjoyable pet? Anything unpleasant that they do that I should be aware of? How big do they get? How long do they live? (and i mean, i wanted an honest answer, not statistics )

Just any hermit owner info would be AWESOME!! thank you!