Not great but not terrible. The main thing I dislike about it is it’s basic design. Unless you have somewhere to place this that is elevated and directly in the middle of the room it is essentially useless. Most people will need to have this on a corner or along a wall, where the power plugs are, but this doesn’t allow that. So you end up having to have it up on its side in the corner of a room precariously balanced just to get the light to hit all the surface of the room and not be entirely located to the corner of the room.
A simple fix would be to allow this to be placed on its side within its design. That way it would actually work.