The unit was conveniently located close to Belsize Park tube, which made it easy to get around London. The area itself is nice.
The unit had a washing machine and other appliances, which were useful. We also found Emily very helpful and easy to deal with.
The bathroom was pretty small and the unit (which was on the ground floor) was quite warm (we were there in mid-summer), but Emily and Phil were nice enough to provide a fan during our stay, so we were comfortable.
All in all, we found the studio a convenient base for our time in London.