We had a great stay in apt.3. The location is second to none - cannot be beaten if you're in London for a show, or a mooch around Covent Garden/7 Dials/The West End. It was absolutely perfect for our plans.
Check in was very straightforward, and communications from Guy were excellent.
The apartment is very comfortable, clean and well equipped, with plenty space for two people. The rooftop terrace is an added bonus! I can't deny the floating stairs up to the bathroom and terrace were a little challenging, but such a clever use of space, and easy enough to manage once you've done it once or twice, even with a slightly dodgy knee!
A little noisy outside late at night, but given the location, that's to be expected, and certainly nothing that could disturb through a decent set of earplugs.
We had a lovely breakfast, and excellent coffee, at The Watch House on Upper St Martins Lane.
Overall, would recommend.