Mirjam and Didi made us feel very welcome and were very helpful whenever we needed to ask something. They even provided us with some toys for the kids to play and a stroller. The appartment is very cosy and I was suprised that I slept very well even though it is "only" a sofa-bed, not a real bed.
Lovely neighbourhood, very close to beautiful Westerpark (with two great playgrounds). Tram and bus are just 20meters away and you can get anywhere in town very quickly. However, it's very quiet.
There's a great bike rental just around the corner, too, where you can even rent bakfiets.