We’ve stayed here twice and loved it.
Small-ish (~50 rooms) boutique hotel on Monmouth Street. Not inexpensive, it’s a beautiful, nicely decorated spot, well-staffed with very helpful people. Nice restaurant for breakfast (it’s open other times, but we’ve only had breakfast there). It’s in the Firmdale Hotel group.
In the midst of Covent Garden, lots of good shopping and eating nearby. Walk to West End theaters. Easy walk to Covent Garden and Tottenham Court Road tube stops.
Enjoy it!