Saw this tonight, and felt the singing was entertaining but the comedy wasn't, so a mixed bag for me.
Some spoilers follow. . .
When I see a comedy, I ask two questions: "Did I laugh?" and "Did everyone else laugh?" and by and large, the answer to both those questions was "Infrequently."
There are two performers with funny bones on stage, but their comic skills aren't sufficiently utilised:
(1) as the Duke and a Policeman, Enzo Benvenuti resembles David Tennant in antic mode, fully embodying the farcical comic attitudes of his characters, and is very funny, but his roles are unfortunately too small;
(2) as Adriana's sister and a couple of other characters, Georgie Faith equally embodies the full comic attitudes of her characters, but unfortunately, her main character's principal attitude is serious, so her superb comic skills are mostly used peripherally, albeit very humorously.
Other than these two, Karen Wilkinson as brash bulldozer wife Luce, and Brendan Matthew as her camp cowed husband, Dromio, make comic efforts that pay off occasionally, which was appreciated.
But overall, this is a very hard comedy to pull off (famously powerhouse comedy duo, Bob Monkhouse and Ronnie Corbett apparently couldn't pull it off either in its London premiere, which flopped) and this production, at least in previews, isn't funny enough either/yet.
I wish I'd seen the Regent's Park version, directed by Judi Dench, which was a big comic hit, perhaps because Dench already understood where the laughs are, having appeared in "The Comedy of Errors" for Trevor Nunn.
Anyhow, John Faal, as the lead, Antipholus of Ephasus, although not particularly funny, is tremendously likeable, resembling a dozy Julian Ovendon, seemingly doped up on downers.
As his other half, the lead female, Adriana, Caroline Kennedy has a dazzling soprano singing voice, and listening to her sing fabulous numbers like "Falling in Love with Love" is one of my main highlights of this production. I fell in love with her voice.
By and large, the best thing about this production is that the entire ensemble pull off the musical numbers, which are gorgeous melodically.
I'd give this production three stars, buoyed by two natural comedians, 8 accomplished singers and a small but energetic and feisty orchestra.
PS: This production certainly does not outstay its welcome, running at 2 hours, including an interval.