First of all, what is likely to be of general interest and are difficult to find out on the Internet is - namely, the size of the projection surface. It is supplied with a second further diffusing lens. This can be on the ceiling create an about 3.5 x 3.5 meters large area when placing the projector on the floor in the corner of the room and lit obliquely upwards. This results in an offset of about 3 to 3.5 meters. If so well fitted for my purposes.
Now to the light intensity. The effect is good to see, even if there are other small light sources. So you have to make no darkroom. Had therefore also fitted.
The effect itself is very nice, because it really is reminiscent of water. Much better than other projectors. But it could be much sharper. The edges see me simply too blurry. I would have imagined better and it would significantly improve the water effect.
But the big drawback for me is the fairly loud operating noise. In chill area for me so useless. The rattle is actually unnecessary, as it has only 10 watts light output and requires no external fan. Voher the crash comes is beyond me. Who uses it in a room with some louder music, the problem, of course not.
Overall, only three points. I have it sent back by return mail.