I've had a 617 for just over a year. I've put just over 5.5K rounds though it. I shoot it every weekend almost. It's the first gun I let people use when introducing newbies to firearms.
I've found the main reason cases get stuck in the cylinder is heat. I shoot it so much each range trip it gets HOT! If I just leave it, go for a drink/washroom break/shoot the #### with people, it cools down and ejects fine. The tolerance's are TIGHT, so the cylinder heating up and expanding causes cases to be tight.
I clean it about once a month, due to high usage. Still looks new. My only complaint is the black on black target sights. I know others love them, but I hate em. I need to take the time and swap out the front sight at least.
It's one of the .22's I put in the hands of every customer new to firearms who walks in the store.
"Here's all the .22's.. This is the one I recommend, here's some other great ones as well.. Here's why on each... blah blah blah.."
Very rarely do they buy it as their first, mainly because of cost. But it's something most experienced shooters can agree on.
It's worth the cost.