These units are well built, silent and easy to use. The option to daisychain power between units is very useful, although the supplied cables are pretty short.
Light output is even, and a pleasant colour. The zoom lens is good for smaller spaces, but still pretty wide when fully spotted down.
My main gripe is that the barn doors are not so good. There are large gaps between the doors so in order to remove dog ears of light, I need to add some black tack between the doors. Also - there is no space for a gel frame. In 30 years of working with theatre lighting, these are the first fresnels I've used where I can't colour the beam.