I saw this a couple days ago and enjoyed it a lot! Little Shop wasn't actually a musical I'd been familiar with before so I thought this was a good opportunity to get into it, and I'm glad I did. I don't think Alan Menken has written another rock score since this show which seems a bit of a shame (apart from a few songs in Galavant that I can recall).
Christian Borle was definitely the standout for me, and I think I enjoyed his performance more than Jonathan Groff's, who almost seemed a bit weak in the first act until Feed Me (though one of my friends mentioned that could've been part of Seymour's character). In general, do they normally double (or triple) cast Orin in other productions? The mix seemed a bit off for the urchins in the first couple numbers, but it seemed to get itself sorted out as the show went on (I was also sitting A103 and have found being close up can do weird things to the sound levels sometimes).
We saw just about everyone at stage door afterwards (were amazed at how different from the nerdy Seymour Jonathan Groff managed to look off stage), and I bought a plant from the merch table to take home. Definitely a fun time, and I might try for the lottery during Gideon Glick's run to see how different it is.