I would highly recommend this hotel - directly opposite Lichtenberg U+S-Bahn station, an easy 8-stop hop into the centre. Also extremely convenient location to get to Schonefeld Airport. There is also 3 separate shops nearby for day-to-day items such as toothpaste, water, alcohol (although not necessarily a day-to-day product!) etc.
The rooms, although basic in terms of facilities (and the vague background smell of cigarette smoke) were extremely clean and the shower was top-notch.
The hotel breakfast was very good, with plenty on offer each day. Even better, if you purchase the bed and breakfast option, if you are unable to have breakfast for one day during your stay (as was our case when we had to catch a flight very early in the morning) they will prepare you a packed lunch for the trip (complete with boiled eggs!). All staff were extremely friendly and helpful
Overall, cannot really fault this hotel and would highly recommend!