I have a Desire (no S), there is the KH-entrance is the upper right corner. In the case this is also the case. I do not know how anyone can argue for the Desire S, the bag would fit. When Desire S, the KH-entrance namely the upper left, hence the case for the S is not suitable. And for the DHD logically fortiori since it is not much bigger.
I had no problems getting the Desire in your pocket. I recommend the following sequence:
1. The top (ie with headphone jack) into the pure pocket. Here it seems to me the opening in the bag to be somewhat lower.
2. Then the lower side (ie with a USB port).
The bag is tight, but not too tight. The smartphone will also not moved back and wobbling. Operating through the film no problem. For the volume buttons, there is no cut-outs, but they are printed in the right place. The same applies to the power button.
The bracelet fits well and can be adjusted by the Velcro in various sizes. By welding, it is possible surely that the back of the smartphone can be a little damp. Could imagine that one similar by inserting a film there still can help.
I am very happy with the bracelet and can recommend it to anyone who owns a HTC Desire.