We had a disappointing experience with Praveen.
The "welcome" was really awkward. We came in to visit family for a week and our plans weren't fully set when we arrived. We thought we may want to have one or two more people from the other house sleep with us at some point during our stay. The first thing Praveen explained to me was that that I had to pay for the maximal number of guests that could come, irrespective of the number of nights that they stayed, or if they stayed at all. This was a condition for him to open up the door to another room. Given that I wanted the flexibility, I was forced to pay the extra $1000 on the spot. Praveen later said that he would reimburse if fewer people showed up, but he never followed up on that offer.
He also forgot to notify us that there was construction work on the building next door (though he admitted to knowing it ahead of time). We had a small child with us, so that turned out to be a big problem during his naps. We ended up having our son stay with our family instead so he could nap in peace. I said this at checkout, but he didn't offer any apology for the hassle.
The place turned out to be fine. It wasn't super clean, just okay. The bedsheets looked dirty, but Praveen said that this was due to the "environmentally friendly way he cleaned them". The location was convenient for us, right next to the Stoke Newington high street, and we spent most of our time with our family outside the house so didn't mind the dirtiness or the construction noise too much.
In the end, Praveen came across as someone who was very keen to make money off of his guests, with little consideration for their happiness or well being during their stay. The billing system he has, with a rate per person for a house of up to 10, must be leading him to tense conversations with guests almost every time someone needs flexible plans, like we did. If this is your situation I really don't recommend the place, but if you know for sure how many people will come (and don't mind the locked doors), then you should be fine. (Though, if 10 of you plan to come, note that the kitchen is only equipped for a max of 6 people or so.)