I must say that staying in Brahmaputra is an unique experience itself. Having stayed in many hotels around the world, I have never came across a hotel like Brahmaputra. There are just so many "antique" to see in the lobby, the walkway, the musical instrument, the animal skin that is used to lay on the sofa in the lobby.
The room is nicely decorated to reflect the Tibetan culture which is largely influenced by Chinese and Indian.
I agree with Herwayzha that somehow the mattress is not comfortable. Perhaps its too firm for my liking. But on the bright side, the room has broadband internet connection.
The hotel is equipped with a clinic, just in case anyone suffers from high altitude sickness. Oxygen tanks can be wheeled to the room for when the oxygen level gets really thin at night.

We stayed two nights during a nine day tour of Tibet. True the mattresses were somewhat lacking in luxurious comfort, but the moment we mentioned we were not comfortable a phone call was made and our mattresses were changed. We were fortunate enough to make the acquaintance of Mr. V. T. Gurung, who spoke not only English (very well, I might add) but four other languages and he made sure that our stay was more than satisfactory. One should also remember that this is Tibet, not Paris, London or New York. We enjoyed our stay and would stay again, if we are ever fortunate enough to visit Lhasa again.

major problems for english speaking vegetarion traveler.

Stayed here for 2 nights as part of our 3 day leg in Lhasa towards the end of December. To be fair, we cannot compare as we have not the opportunity to stay in other hotels in Lhasa. The entrace and lobby was grand but it felt very cold (temperature wise) and dark-ish in the lobby and obviously there was no heating. The reception staff were all wearing heavy coats!
Check in was no problem as it was handled by our guide.
It was very obvious that it was low season with almost no people in this very big hotel. The corridors leading to our room was also very cold with minimal lighting. However, fortunately, the room and bathroom was warm with a portable heating. There was also a computer terminal with free internet connection as well.
Breakfast was served at the restaurant on the first floor and we needed all our thick clothing on as it was not heated. Breakfast was no big deal but adequate. The staff were friendly..again working with their thickest clothing on! There were like three tables when we were there. Housekeeping was prompt and helpful but expect a language problem.
We have no complaints really having prepared ourselves not to expect too much from the usual tourist hotels in Tibet. This hotel is not exactly in the old town centre of Jokhang temple and barkhor street but it is only a 10-15 minute taxi ride away.