I saw it once and am glad I did.

Rating: 8/10 (18 July 2015)

Yes, the principals are excellent doing their jobs. However - for me Emily Blunt stole the show followed very closely by Stanley Tucci, these two really took their roles, started in the basement with them, and proceeded to ascend to the Penthouse.
Emily Blunt and Stanley Tucci are, figuratively speaking, guardian angels to the newly hired young lady.
If I had invested in this production, I would be very pleased with the end result. There were some snafus to be sure, but I didn't feel that they took away from the interesting story, or the sometimes frenetic pace.
Well worth seeing at least one time, worth the price of a ticket. If you wish rent or buy it, you may watch it more than once.
A well earned plus is that two very picky friends of mine liked it very much, and that carries some weight with me, a non reviewer:)