Pros: all rooms and public areas fresh, modern and clean; great rooftop swimming pool and gym area; amazingly central location; super-helpful staff; decent buffet breakfast.
(Minor) Cons: it's a modern 'business'/tourist hotel, so if you're after something very traditional/local it's probably not the place for you; some people (and the Lonely Planet) note that it can be a little noisy as a result of its central location - possibly an issue if you are a very light sleeper, although neither of the rooms we stayed in (including a 1st floor street view room) really felt very noisy at all....
Summary: a great choice for a clean, friendly, central hotel while staying in HCMC; on our second visit, the reception staff were kind enough to let us check in at 10am and upgrade us to a suite for free - really made a big difference after our early morning flight, and typical of how the staff generally went out of their way to be helpful to us during our stay. Would recommend this place.
Local tip - the street restaurant that sets up along the side of the market round the corner (out the hotel door, turn right, and right again at the first corner then 50 yards up on your left) is well worth visiting. It doesn't look like all that much, but was so good we had to go there twice during our stay - really fresh, tasty, authentic food - some of the best meals we had in Vietnam (and that's saying something!).