I stayed here for a week in September 2007 while on business (giving talks, visiting schools). The hotel was chosen and booked for me.
The hotel is small and recently opened with the rooms of the original house refurbished to a high standard - if you like modern style dark wood and smoked glass, ceramic and chrome (I do), then you'll love it.
The area is quiet and elegant, meaning you get little or no noise in your room but you're a good way away from the centre of town (not walking distance at all). Staff have very good English and are highly attentive and personable - first name terms almost immediately, and nothing was too much trouble. Ringing the bell to be allowed in when you get back makes this a different hotel experience, but it didn't trouble me in the least.
Big plus points: quiet, nicely fitted rooms, great staff, excellent breakfast, free wifi connection, and gorgeously quiet!
Minus points: no minibar in room (I do like to grab a cold beer when getting back from a day's work). Plus there is no lift to rooms, so elderly people might find it tricky.
So if you're going to Buenos Aires for 2 days to experience the highlights - this isn't the place to be, I think. But if you're going to relax or to work (outside the downtown), it's a very nice place to stay.
The hotel doesn't have a restaurant. Personally I like to eat out so no big deal. There are good places to eat within 10 minutes walking distance - the pick of the bunch has to be '1816', on the corner of 11 September, just brilliant food and service and astonishingly cheap if you go for the 'order what you want for a fixed price' deal - highly recommended, hotel staff will tell you how to get there.

We stayed in this hotel in mid - January for 4 nights at the end of our 3 1/2 week trip around Argentina. We chose this hotel because of it's location in suburban Belgrano where we thought it would be a quiet area and it was. Overall this is probably the best hotel we stayed in whilst in Argentina and we stayed in some up-market properties. The hotel is in a huge renovated old house in Belgrano, it has been very tastefully done in an Art Deco style. You have the reception and an adjacent cafe where you can take breakfast on the ground floor, then up some grand stairs you have a couple of lounges for your use and there are some rooms on this floor then the top floor is only rooms - this is where we were. We had a deluxe room which had a large balcony and a luxurious bathroom with a spa bath. All the room fittings are of a very high standard and a lot of though has gone into the lighting, furniture, etc... On arrival the intelligent and thoughtful manageress sat down with us and discussed our requirements during our stay. Restaurant recommendations were given and she ended up making the necessary reservations for us. There are plenty of maps available at reception and items of interest to us were marked on one for us. During our stay the accent is on doing whatever they can to make your stay a memorable one. On the afternoon of our departure the receptionist phoned up and invited us down for coffee and biscuits because she knew we had a late flight home and wouldn't have a meal until after midnight. Try getting this kind of consideration at most hotels!! One afternoon we walked from the hotel to Recoleta but that was a mammoth walk that took most of the afternoon - well worth it as you pass by some nice areas and walk through the Palermo parks. Mostly we took taxis by flagging a radio taxi down outside the hotel. Two of the restaurants we went to - Olsen and Sucre you would probably have to taxi to anyway. All reception staff are fluent in English. For a quiet and comfortable place to stay I could thoroughly recommend My ba Hotel. To see more photo's of the hotel look at my Flickr photos on http://www.flickr.com/photos/kiwiexplorer/sets/72157594489478882/ We also stayed in Puerto Madero and in Recoleta but this was the right location for us at the end of our trip when we just wanted to relax.

I've just spent 4 days in this hotel, and it was truely great. Design and decoration is art-deco style, high level of luxury. I had room 1 that had seperate bathroom, longe and bedroom. It even had a private garden area with seating.

The owners and staff are all very friendly and give you a warm welcome and make your stay a happy one.

As a business user I benefitted from free 54mb WiFi, but all guests can use the computer located on the first floor.

The location requires a short taxi ride to some good restaurants, but the hotel will get you the taxi, and its really cheap!!

Overall I had a great stay here and would recommend it for a few days.