+1,I agree with everything in your review.
I am here now for 4 nights. If you want peace and quiet this is the hotel for you

I do not find the location troublesome. There is a local bus (SB51 - EUR 2,90) that goes directly to the airport, bus stop is 300 metres from the hotel entrance. The bus takes 15-20 minutes. Only downside is that it only operate once every hour during day time only, and not on Sundays. I found it to be very handy

The end station of U-Bahn Seestern (U77) is right infront of the hotel, this seems to operate every 20 minute. It takes you to the downtown core in about 15 minutes. Very convenient and easy.
As a Titanium I was upgraded to the same suite (?) as above, #1110 . It's outdated, but very spacious and comfortable. No complaints. Got a good rate, so I am very happy
The bar/restaurant is very business like and the ambience is not very cosy. However, they do serve some nice German dishes and have a few beers on tap, which is highly appreciated. Service is very efficient. I do not have breakfast included, so I can not comment on that. Breakfast seem to be 22 EUR per person. There is a Kamps bakery 200 meters down the road, which opens at 6 AM. Unfortunately it is closed on Saturdays and Sundays. A mere 15 minute walk (or 4 stops on the U-bahn) takes you to Belsenplatz, there is an abundance of bars, restaurants and supermarkets (Aldi, Rewe, etc) there.
I would def stay here again if the price is right. The "deserted" location is not a problem for me, as long as convenient and comfortable public transportation is to be found right outside the door.