My wife and I stayed at the Mamilla for 3 nights. The staff (especially the concierge team) was very helpful. The hotel is in a great location, and is a 5 minute walk (through the mamilla mall) to the Jaffa Gate in the old city. The breakfast was great - probably the best spread that we have seen at a hotel.
The decor is very modern - clearly a lot of thought went into the design of the hotel and rooms. The one drawback (and the reason why the hotel doesn't get 5 stars) is that the beds weren't particularly comfortable.More