My family of three (toddler) used Benny's as our main base for London. We were on a UK holiday, and these days were meant to be mostly business for me, with time for fun in the off-time. Benny's is a well-priced B and B. We stayed on the third floor (I think) with double beds. The room had a kitchenette (sink, kettle and mini-fridge) and small bathroom. In a separate room there was a microwave and toaster. Listen, this is basic accommodation. It is absolutely fine for a just place to stay.
What really gives Benny's a great rating from us is Benny himself, and the folks helping him. He was full of suggestions for where we could go, and what we could do. At breakfast we would often have talks on politics, or anything but politics, giving a great communal atmosphere. Benny even walked with us to a nearby park to show our son the birds--brilliant.
So in terms of facilities--it is a basic place to hang your hat for the nights. In terms of meeting a nice owner who looks after his guests, A+.