So overall they look decent.
Brightness control is broad enough and they are plenty bright at the highest, dim at the bottom, without a major gap before going off.
Color is... OK. Each of the three colors are pretty decent. But they are hampered by the optics. When you want anything other than a base color the blend is noticeable even when on something a good range (10ft) away. This can be a good or bad thing. For us it is neutral. Some purposes good, some bad.
The optics do help it have a cone of light versus the more narrow focus an LED typically has. I wonder how they would work roughed up a bit to diffuse it more though. I might try that out.
Overall: Satisfied with the purchase, especially on sale, but not sure I would consider retail price justified.