I saw this tonight, and enjoyed it quite a bit! I've never been exposed to Shanley's work before (not even Doubt or Moonstruck, though the latter is one of my mom's favorite films). Knowing it was a light comedy, I really wasn't expecting much, but I was definitely pleasantly surprised. Shanley's dialogue is impeccably written. He has such a sharp wit, and he really packs in the jokes. The whole cast has excellent timing, and they work together really well.
I've always found Sherie Rene Scott to be kind of annoying, but I'm really starting to turn around on her. She was a surprisingly good Gertrude in Hamlet this summer, and she delivers a really outstanding comedic performance in this.
The play has some heart to it too, particularly in the end. The plot has echoes of A Little Night Music. Ultimately, the subject matter and themes are fairly run of the mill, but they're hardly the point. It's the comedy and the cast that makes the show soar. I agree with Alfie that there were some moments that dipped in energy a bit. But part of it is just that they really hit the ground running from the very top of the show, packing in a lot of laughs from the get-go. So the less high-octane moments feel lower by comparison, though I think they're still good.
In any case, I would recommend this to people. It's not life-changing theatre, but it's a very fun evening, and even if you don't like Shanley's writing, I think it's worth it anyway for the cast.