We had a great stay at Ali's!
We stayed there for three nights and what we loved the most was that it was exactly as described!
The location is awesome, just across the road from Kensington Gardens, there are plenty of buses that can take you wherever you want to go, and there are also two metro stations nearby, so everything seems pretty accessible.
The room was incredibly clean and it had everything we needed. As Ali previously described, it is nothing luxurious, but it is clean and it has everything one needs, especially if you're on a budget-stay, as we were. He was also very quick to respond and willing to resolve any tiny issues we had.
Moreover, the toilettes are right next to your room, so it's not that much of a big deal to share them with other inmates. They are not the cleanest thing we've seen in our lives, however, that was also expected, since Ali politely explained that all the shared rooms are mostly taken care of by other inmates, so they may not be in the perfect condition. Therefore, we did not mind that all that much.
I would gladly recommend this accommodation to anybody! :)