jasons apartment is awesome, very well situated and would be great location in spring summer with park etc. the trams were really handy and having the bar / cafe downstairs was useful, staff were fun and the place rocked on a Friday and Saturday night, though a bit noisy if you were expecting a quite night in. only two things that could be better.
the kitchen does not have much storage space and the pots pans etc are crammed into one cupboard. plates etc on high shelf which if you were a short arse would make life interesting. the other is that the access staircase to the apartment and the internal staircase between floors are both very steep (pretty normal in Amsterdam) but it would make access for an older person or a person with a disability like a dodgy knee or hip very difficult. also if you had a lot of luggage that would be fun as well!