I think its excellent, truly, wonderfully excellent.
I'm not quite a fan of Constance, her projection is a little obnoxious, and the overall theme of her is too macabre for the humorous-Haunted Mansion.
However, they cleaned up the ride amazingly. Prior to the refurb, the HM was in horrible shape, to the point where there was no sound/just static in some of the doombuggies.
The new scene the added (Escher staircases), is awesome! It fits in perfectly! And floating Leota is very cool, as well as the updated projections from her.
The refurb definitely put the WDW Haunted Mansion on top.