I do have SV10 Prevail III sporting. not trap but same action and barrel without the ribs.
i have purchased it brand new and used it around 5000 rounds i believe, Still after 5000 rounds it was still tad stiff on ejecting and opening the action. The trigger is very crisp with easy to operate. You can adjust the pop off or lift off ejectors in seconds, just need to turn one small screw quarter way and bam.
The Kick off system was just ok.... not worth few hundred bucks and would rather recommand custom recoil system for same dollar value.
Id rate the sv10 9/10 only because the ejectors were little sticky and everything else was perfect.
i have few other berettas such as Urika 1-2, 302, A400's, SV10, UGB25 Trap, and few other field guns, I still choose to shoot AL391 trap rather than other 4000-6000g shot guns. I would say shoot it if you can find someone that has one or feel it before you buy the shotgun.
good luck!