I stayed at Tomasz apartment for 3.5 weeks in February and can highly recommend it. The room is very cosy and feels clean, with loads of space for clothing storage etc. There is also a desk in case you want to work from home.
I had never been to the area before (Bethnal Green) so make sure you do your research beforehand. It's a very close to walk to Shoreditch and from there into the city - loved taking a long stroll through East London. It's also very close to Victoria Park and the Sunday food market there. Overall it's an area with a lot of character and that's well connected to other parts of London - I took the central line tube (5 mins walk from the apt) straight into work every day.
Tomasz is also very friendly and communicative, he tries to ensure you have a great stay. There was just a minor issue with the key being a bit difficult to use, however that was solved quickly with Tomasz help. Again, I recommend staying here!