Smartments were a really great place to stay, myself and my partner really enjoyed it.
It's clean, convenient, easily accessed and gorgeously designed.
Although the area is quite suburban, you're spoiled for grocery stores, barbers, chemists... Its right beside a lovely woodland park, great for both light strolls and hard-core work outs! And the train station is literally right next door so you can get to central Berlin in 20 mins or so.
Lovely spot, would stay again.