We stayed for a month. The location was great, very close to Gloucester Road and close to the lovely Cotham gardens.
The place was okay but not amazing. There was congealed milk and a half-open bottle of cream in the fridge when we arrived. The place didn't have a freezer and needed some fixing (fridge compartments held together with brown tape). The Internet is fairly slow (15 mbs download and 1 mb upload) and would sometimes randomly stop - plus the router needed restarting every couple of days. If you're sensitive to noise, get earplugs - the neighbours make noise until 1AM.