I stayed here for two nights last month. The lodge is a short uphill walk (maybe 2 minutes) from…read morethe Swiss Cottage tube station, but the surrounding area is not very exciting. My group stayed in a ten bed female room. The room was in the basement floor, which meant very little air circulation. The weather in London during our stay was rather cool, but because of the lack of air circulation, our room was incredibly stuffy and it smelled like gym socks. Also, the wifi didn't reach our room and the common room was often full, so when I had to check my email I sometimes had to sit on a stairway.
The showers were clean, but again, no air circulation and I saw mold on the ceiling. The toilet stalls were the smallest I've ever had to use; To get out of the stall, your legs WILL rub against the toilet bowl. The bathrooms are communal for the floor, so we had to share the bathroom with a bunch of guys. Also, I dont think they clean the bathrooms every morning because I saw the same bits of gunk over twelve hours later.
The things I did enjoy about this hostel were the free breakfasts (toast, cereal, coffee and juice) and the friendly staff. I liked the large lockers under the bed and the hostel felt very safe. Each bunk had privacy curtains, a reading lamp, and an outlet.
Overall, I would consider staying here again, but I wouldn't be excited about it.