I have the Prime with the Ortofon Quintet Black MC catridge. About 6 months old with 75 - 100 hours on it. It is really smooth, great soundstage, but wouldn't say punchy with the Quintet Black. The Quintet Black does everything well, but there are more expensive options that are much better at punch, dynamics, but maybe not as smooth. Depends on your taste. I really love the Ortofon's midrange and outstanding on vocals in particular. The soundstage and detail is excellent.
I am actually thinking of selling it or trading it in for a two armed table very soon, as I think I want to get into a mono and stereo cartridge on the two arms. Can't complain though and highly recommend the Prime. It is way above its price point and a super value (if you can consider $4000 a value). I haven't heard a bad review on the Prime, including the forums. The other good thing about the Prime is there are so many upgrades you can do to it - you'd probably be set for a very long time.