I strongly recommend this place. Barbara and Alessandro are cheerful and italian, this means you get both the qualities of the german and italian hospitality. The room is cosy decorated, perfectly quiet, the bedding (mattress, duvet, pillows) are of top quality, and many discrete but tasteful details make feel you at home. Irreproachable cleanliness. Flexible check-in and out. Important detail : if you've got a heavy luggage, there are no stairs that could explode your back!!
The bistro just looks like them, definitely having a warm soul together with designed furniture, and the food and wine are rare because italian and fully hand-made.
There is also a direct access from Tegel airport. Indeed, U6 is about five minutes walking, and you'll reach any place downtown within ten minutes. Wedding is a great place to stay in Berlin, not hard-surfaced but green and lively.