Great appartment with plenty of room for 8 adults and fully equipped with everything you could possibly need. It's quite warm due to the underfloor heating but the owner said he was happy to turn it down.
Good location with bus stop on the doorstep and S Bahn about a 10 minute walk away. Bus took about 10 mins to get into the centre and we walked to Brandenburg Gate in 40 mins. Easy to get to from the airport. Good choice of local restaurants and bars within easy walking distance. We used the small local supermarket round the corner which had everything we needed, but there are bigger ones close by also.
Would highly recommend this apartment for families or groups of friends wanting to stay close to central Berlin without paying the high prices charged for the centre of town.