Good location and good concierges,especially Juan.These are about the only things good about this hotel
The bad was reservations efficiency.When we checked in we were told that even though we had printed Marriott reservation confirmations that, that meant nothing to the Marriott Plaza front desk because "we have our own system and we are not really a Marriott hotel,,,we still consider ourselves The Plaza,Buenos Aires"....WHAT ????
The bad included room service that despite 6 phone calls during our ten day stay only once appeared at our door with our order.That one successful call to room service resulted in two extra wine glasses to be delivered so that we could serve 2 friends wine in our room...For this "priviledge" the Plaza charged us a non-refundable "rental" of $2USD each to "use" the extra glasses...How classy !!!!!
The bad also includes rooms that are small,unexciting and their age is obvious.
The ugly was the front desk check in service.For over an hour we were forced to deal with an abrasive,obnoxious and totally inefficient woman by the name of Lucila.During our one hour check in with this woman she came up with 5 differing dates for our departure despite having all of our Marriott printed confirmations in front of her.After coming up with these 5 differing results from her computer she told us every time that we had to move out on the newly found date because they were full...It was obvious that she was computer illiterate.We subsequently overheard other people attempting to check into this hotel shrieking at this same Lucila over her attitude and inefficiency.This is a woman who definitely should not have contact with the public.My suggestion to the Marriott is to re-train their front desk personnel and to send Lucila to "Charm School."
The one major plus to our Marriott Plaza experience was that the problems caused by the front desk necessitated us moving to the Caesar Park hotel for 2 days.Now that is a classy hotel.Great location,fantastic staff,wonderful rooms..in short everything the Marriott doesn,t have...My obvious recommendation...stay at the Caesar Park and avoid the Marriott.

My wife and I stayed two nights at the Marriott Plaza the week prior to Easter. Although I had booked a senior rate, the room was upgraded to a suite. We had requested an early check-in, but had to wait an hour until the room was ready, so maybe that was the reason for the upgrade. The suite consisted of an entry, bedroom, living area and bath. The room was handsomely decorated, in immaculate condition and completely modernized. The conceige handled our requests for a tango show and estancia visit, the business center had three computers and most of the first floors were wi-fi. We ate a light lunch at the grill next to the pool and breakfast buffet in the main restaurant, both good. The desk also scheduled a 5:30 a.m. taxi. The Plaza is on the main shopping street, Calle Florida. A couple of blocks from the hotel is the Gallerias, a world-class shopping mall.

Based on some of the recommendations from this site, my expectations were not high. Fortunately, my research proved correct and this was a quality hotel with comprehensive services and a efficient/friendly staff.

We were in a large business/ professional education group that stayed here for five days. Our room #810 was very pleasant, good sheets, bedding, pillows - but the sheer curtain on the one window had a big rip it it. We also would get sometimes three towels, sometimes two a day for two of us. The a/c was also problematic - but not an issue because of reasonable weather. The exec lounge was on our floor, but we could not use it because we are not Marriott elite stayers... which was interesting. The standards are not as high as one would expect, but the staff is very pleasant and helpful in other ways, especially the Concierge desk. If you appreciate history, this is a great place to stay, but it hasn't changed much since we were there twelve years ago. The location is wonderful, right off the Florida Mall, across from the lovely San Martin Park, next to Casa Lopez leather. Exercise room was touted as good by Frommers, but it is not.... two of four treadmills were out of service when I was there and service is fairly non existent. Pool is very nice, though we did not try it this time. The old bar is really lovely, with wonderful service - and the breakfasts were very good. If you want to see some excellently done tango, go to the reasonably priced show at the classic and old literary Cafe Tortino a short cab ride away.... we loved it. BA is a bargain right now and there is lots to see, so enjoy it while you can.Also recommend the US$ 27.50 buffet lunch at the Alvear Palace - some of the best food we had in SA, in an extraordinary setting, right after we had watched Queen Beatrix of the Netherlands leave in her limo, applauded by the Recoleta neighbors on the street!

What was once a grand hotel (it IS a beautiful building) has been water-downed by the folks at Marriott. Average in every respect with the exception of the location. If you want this caliber of hotel at a better price stay at the Claridge.