How long have you use it?
1 year.
What is so special that you like most and least?
The +: the effect created by the beams of green and red lasers combined with the wave of the blue diode, the ability to set speeds, dimmer and shutter.
Have you tried many other models before buying it?
Not
How would you rate the quality / price?
Correct.
With experience, you do again this choice?
Yes.