Mervyn's place is very convenient with easy parking, very close to tube station, big room and although it is in a shared house we literally didn't hear him. He was very pleasant at check in and showed us around but then it felt like we had the place to ourselves, very private and quiet. He even allowed us to leave our car parked there the next day and return to collect it later in the day which was very nice and convenient for us.
A couple of things which could be improved:
While the bed itself was comfortable the pillows were so thin, I've never actually seen pillows that thin.
The towels provided did not smell clean, and when used I was left with bits of black shaved hairs stuck to me, which was less than ideal! This was surprising as the place otherwise seemed really clean.
Overall a bargain and would return for the convenience, but would bring my own pillows and towels.