After a couple of months of usage in a small and intimate music theatre we are very happy.
Diffusion filter is a must, otherwise they are a bit too hard for performer's eyes.
We had to use some adhesive tape to kill disturbing back spill of light (which got even worse with diffusion filters) but no problems as they do not get hot at all.
Led info display is nice and bright, but we also taped it, not to disturb the audience.
Completely silent, yeah!
The info does not mention, but barn doors are included, which is nice.
Totally recommend, would buy them again.