In most cases, you should ask this question before you bought the gun, if you must ask.
But in this case, you'll most likely hear all the good things about it. MX-8 is the shotgun used by most Olympic winners since their introduction in the '60s. Based on my experiences, if you shoot a lot, it's also the most cost effective shotgun.
It's well balanced, great trigger, easy to maintain, mostly owner repairable.
Depends on the series type 1 through 3 had some problems with forends cracking but that is in the older guns pre 75 I think. The type 4 which would be from about SN:50,000 and on are all about the same and one of the best guns to buy used.