if all you're really looking for is a nice, quiet place to sleep after a long day of exploring london (like i did), this room will satisfy your needs. it was just enough space for me to store my things and sleep. it's also right near the shared bathroom.
the shared space is ok too. you've got a kitchen you can use and a washer/dryer there. the garden is cute. but the floors aren't always super clean. i would bring house slippers if you don't want to wear your outside shoes all day.
the underground is just about 10mins away. the northern line from morden station can take you straight into central london and runs pretty late. there were no issues of my leaving super early and coming back super late.