We originally booked Fitzrovia Studio 2, but were "upgraded" to Fitzrovia Studio 3. It was a perfectly sized studio apartment for my wife & I and our eight year old daughter. Great location and just about a 15-20 minute walk anywhere. No shortage of various restaurants & pubs in the neighborhood and a convenient grocery store just down the street. The bed was comfy and our daughter slept on the pull out sofa/futon. The apartment was very well appointed- we didn't cook in the kitchen, but did use the microwave, coffee maker, and refrigerator. We even did a couple loads of laundry (the heated towelbar/rack in the bathroom quickly dried everything!) Despite being on a somewhat busy street, the apartment was very quiet and we slept soundly every night of our stay.
Only three minor issues are keeping me from giving a five star review: 1) the heat in the apartment wasn't working when we first arrived on a cold and snowy morning and it took two days until it was fixed properly. Not a big deal as there were plenty of blankets! 2) the fire/smoke alarm went off occasionally during the last two days of our stay - some maintenance men were working on the control panel downstairs, but we had no idea what was going on, if it was a test, or if we should evacuate! 3) there was a bit of mold/mildew on the walls and ceiling of the shower. Otherwise the apartment was spotless and very well maintained.
We would definitely stay here again and would recommend to our friends traveling to London. Belinda and the other London Agent representatives were very quick to respond to any issues via email or phone - they are very professional.