Flat is in very good location if you're interested in Pendik. A lot of cafes and restaurants around, parks, ferry terminal is in 193 metres. Marmaray station is very close.
Flat is small and quite simple, but totally fine for short term staying for 1-2 people. Simple kitchen, washing machine, heater/ air conditioner. Good internet connection and no problems with hot water (sometimes it happens in different apartments).
If price is ok with you then you may rent it.
Vahdettin is polite host, ready to communicate.