The Asia Ruby was our first experience of a hotel in Vietnam. We got a taxi from the airport for $10 USD and he got us to the hotel, no problems.
We stayed there for a total of five nights in December / January 2013 with our two children aged 10 and 13. We booked (through expedia.com.au) two separate rooms a double and a twin, with a connecting door. Cost was $97 AUD per night for the two rooms.
The hotel is situated across the road from a huge park, the 23rd September Park. When we stayed there it was full of activity for the Christmas to New Year period. Market stalls, eating places, entertainment etc. It was a bit noisy but the noise stopped at 10pm. Unless you are travelling at Christmas / New year, this probably won't worry you.
Staff were friendly and courteous.
The hotel laundry was a bit expensive (eg $1 per shirt, $2 trousers) so we found a laundry a couple of doors away from the hotel that did it for us for 25000VND per kilo (and in fact there were a couple of more laundries in the vicinity).
The rooms were nice, and it was great to be able to have a connecting family room. Some of the finish, particularly in the bathroom, left a bit to be desired (eg badly measured/cut tiles with the gap filled with filler, loose fittings). We also had problems with a tap that wouldn't turn off (not just dripping, full-on running), which they fixed on the first night, but the problem recurred a couple of times. This didn't have a major impact on our stay, it just took the shine off what appeared initially to be a well built and decorated room.
There were the usual complimentary bottles of water, and also an electric jug and mugs for coffee tea etc, but there was no coffee or tea to put in them!
The hotel was in easy walking distance of most of the points we wanted to see in Ho Chi Minh City - markets, Reunification Palace, War Remnants Museum, Notre Dame Cathedral, shopping areas etc. There are also many ATMs close by but beware that they charge anything from $1 to $4 per withdrawal. HSBC I think was the most expensive one we found.
Breakfast was very nice and plentiful with a selection of Asian and western dishes. The coffee was hot but the juices were only just cool (unchilled or at least not continually chilled).
The hotel had free wi-fi, with a strong signal to the foyer and rooms.
We went on a day tour to the Cu Chi Tunnels and Cau Dai temple, arranged through the hotel. [BTW, when on the bus the tour guide asked us (and several others on the list) to pay the 90000VND admission to the tunnels to him. I am not sure if this was a scam or not but I would imagine that anyone on the bus would have paid for the entire tour which included admission. We told him that we had paid for the tour at the hotel and everything was fine].
It was a nice hotel and we would stay there again.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.