The most amazing is Tas himself. He is a great host. We stayed for 1 month, that is a long period. Any problem we had was solved within a few hours (we did not have much). One example is that the WIFI reception in the bedroom was not good enough. Tas sent a technician to install the WIFI extender within 2-3h.
The apartment location is great. Holborn and Covent Garden areas are great. The apartment is 2min from the underground. You have a very nice pub and 2 special coffee shops just a few feet from the building entrance.
The apartment itself is well maintained. It was refurbished recently (I believe). The living room, the kitchen, the washing machine, micro... all looks new and very clean.
The bathroom was also well maintained, in very good condition and very clean. All pipes worked very well including the drains.