As stated in other reviews, the location for the apartment is as good as it gets in Bangkok and Henry is indeed a gracious host. Our flight into Bangkok was delayed and Henry was there to meet us when we finally arrived at midnight. He responded quickly to all texts and emails and happily accommodated our changing travel schedule on both arrival and departure. I would not hesitate to recommend him and stay there again. The photos provided are accurate.
There were no issues with water pressure at all, and while you can hear the Skytrain from the apartment, it was not an issue at all as far as being able to sleep. The Skytrain stops running shortly after midnight and Asoke is a late-night area, so it was quiet in the apartment each night when we turned in.
The washing machine was a big plus, as we arrived in the middle of a 2-week trip and were traveling light. Detergent for the washing machine was even included! The kitchen is well outfitted, though there is very little need for one in this area. There is a 7-11 just outside the entrance and really great street food right on the soi if you are looking for that. You can also walk to many restaurants and the nearby food court at Terminal 21 is one of the best values in the area if you want street-style food with the cleanliness and comfort of a mall. We were a group of three and were able to entertain 2 additional friends comfortably in the living area. Our friends (who live in the area) were very impressed with the apartment as well. Great TV reception, fast wi-fi, good air conditioning. We really felt at home.
Things to be aware of if you are staying there: The drapes are not blackout drapes, so bring a sleep mask if you are going to be getting over jet-lag and cannot sleep with light in the room. The beds are also Thai style, which may be a little firm for western tastes, but that's the norm in this part of the world. The building has 24-hour security and controlled access, which made us feel comfortable, but only 2 access keys were provided, so it took a bit of planning when 3 of us had different places to be.