It certainly produces a nice effect. I think it definitely adds to a lot of photographs. It's pretty easy to tell that this was handheld however. The closer crop is better but they both exhibit some softness due to slightly different angles on the photos used for the technique. I still think the only way to get a sharp good HDR is to use a tripod. Don has definitely led all of you down a path here. If you are using Photomatix you may get by using the "by matching features" option. But nothing beats tripod lined up photos. Even then some shake is sometimes introduced and the photo is ruined. Another way to avoid this softness is by using a single RAW image and processing it for different EVs.
A good photograph is knowing where to stand.
Rule books are paper, they will not cushion a sudden meeting of stone and metal.
Ernest K. Gann-Fate is the Hunter.