Decided on the upstalboom after reading a few reviews and them being the only hotel with a triple room.

We got to the upstalboom just before midnight to be greeted by a smiley receptionist very quick and easy check in. The room was Big with two single beds and one fold out sofa bed. The bathroom was basic with toilet and shower(no bath) and a washing basin. Our highlight was the fridge it was HUGE and we could fit all our alcohol in it.

Breakfast-Really good, good choice of cold cuts/cheeses, Cereals different types of breads. Hot foods sausages/eggs/hashbrowns. Lots of different choices of teas and juices. Fresh cakes-i recommend the cheesecake if you are so lucky to get some. We didnt it went really quickly and they didnt bring out anymore.

There is a gym and sauna room which i didnt use but had a look at. very basic gym and small sauna room.

Internet terminal we read was free didnt manage to use it as they had a private function in the room you need to go through to get to the terminal. It also has a printer too.

Unfortunatly the thing we were looking forward to most is the roof terrace bar but it was closed due to cold weather and snow.

Otherwise everything in hotel was good and for the price you couldnt ask for a better hotel in a great location.We found it easier to get the the hotel from Warschaser Strabe (5-10mins walk), which has all the S/U Bahn lines so easy to get to from the airport.
Lots of bars and restaurants nearby on Simon Dach Strabe.

We arrived at the hotel tired and hungry but from the moment we entered the bright welcoming reception area to stepping into a lovely clean room we knew we had made a good choice. Staff were friendly and helpful, the evening buffet was inexpensive whilst allowing us to sample some German food without the risk of going hungry! The breakfast (bread rolls, jam, cereals, meats, cheeses, bacon, sausage, scrambled egg, salad, fruit etc etc) was filling and an excellent preparation for a day's sightseeing!
The room was comfortable and airy, the roof garden terrace is a must although we didn't find it until our last night! Some fantastic views when clear.
All in all an excellent value for money base to explore everything that Berlin has to offer. We are definitely returning next year!

Why do I love this hotel? It struggles to reach it's 4 star rating by normal standards. You only get a shower,no room safe (although valuables can be kept at reception at no charge), no tea / coffee facility, no trouser press . no robes and the hotel itself, while not in a seedy area is all the same a little worn!
However what you do get is a hotel where you will feel immediately at home in. Rooms while small are tastefully furnished clean and well presented. Linen and towels are good quality. Staff friendly and efficient. Gym and sauna are free of charge. A delightful roof garden with bar is available in suitable weather. Breakfast is inclusive in the room charge with an extensive choice that puts many hotels were breakfast is an extra to shame.
The hotel is well situated for public transport to all areas of Berlin. Tram routes M10 M13 and 21 are minutes away (M10 runs all night). The S Bahn is just 5 min including the S9 that gives direct access to Schonefield airport and the S7 to Potsdam. The U Bahn ( U1 ) 7 min.
In conclusion, a hotel that is not quite 4 star but neither is the cost. A hotel that is modern but charming in one of the most atmospheric parts of Berlin. Highly recommended.

I stayed at the Upstalsboom Hotel from May 25 to May 28, 2007. This was my sixth or seventh visit to Berlin and first stay at the Upstalsboom.

The Good: The hotel is very clean. It is fairly new construction which is something I like in a hotel. It is located in a residential neighborhood, about 10 minutes from the nearest train and there are some convenient local food markets and restaurants.
The staff is fantastic. They answered all my questions cheerfully, made dinner reservations for me, called taxis, gave directions and never hesitated to help out. I have stayed in luxury hotels where the level of service wasn't as good. The hotel has a beautiful roof garden where you can relax and have something to drink or just sit and read. The breakfast buffet was good and the dining room was pleasant. There is a computer for free high speed internet access.

The not so good: My room was an attic room with a sloping roof. There was a large widow on the sloped roof and it was right over the bed. Since it was unseasonably warm and there is no ventilation in the hotel rooms I left the window open the first day and there was a severe rain/hail storm. The water poured in and onto my bed. The next day I closed the window when I left. Once again there was a severe storm. When I got back I found that the cleaning staff had left the window open and the water had once again poured onto the bed. Both times the front desk attendant came up to my room and very cheerfully changed the bedding and carried away the soaked blankets and pillows. I would suggest that if you are given one of these top floor rooms during the warmer months you might ask to be changed to another floor. Also, with no air conditioning the rooms in this hotel get very, very warm. I would probably choose a different hotel were I to return between May and September.
Another negative about the room is that it had a door to the adjacent room. There was absolutely no sound proofing so the first night I had the very loud sound of the tv next door booming through my room until 1am. That guest checked out the next day and it was quiet from then on out.

Bottom Line: I would stay in this hotel again if I could be sure not to be on the top floor and it was not summer weather.