I only have 2nd hand knowledge since I don't own one but do have friends who do, 3 of them all with the .22LR models. They are very satisfied, believe quality is very good and customer service is excellent. By customer service we're not talking repairs since they've never had to send a Henry rifle back, but they do order parts like the loop lever and Henry is very fast and accurate in order fulfillment.
I'd be interested in comments from actual owners, though, since its my understanding Henry is coming out with a Big Boy model in .45-70 and if that's true I'll become a Henry owner. I've wanted a .45-70 for some time but the Marlin factory problems with quality control have kept me away.