My wife, one year old daughter and I stayed at the MB for one night in September of 2013.
Location: At first glance, the location is excellent as it is 50 feet from St. Michael's Gate and many shops and restaurants. The location is horrible when it comes time to sleep. The adjacent night clubs play very loud music well into the next morning. This made sleep very difficult. I suggest bringing ear plugs if sleep is a priority.
Room: The room was spacious, modern and very clean.
Service: The service was minimally helpful. E.g., I requested a late check out (1 hour) from two different people working at the front desk the day before check out to accommodate my daughter's nap the following morning. Both told me "no, this is impossible." I offered more money and asked about other options but the staff were unwilling to negotiate or offer suggestions. This was an unpleasant first.