Used for two years, most are the size Reduces the light output returned very well (very good quality lens), the system to change the lamp (the ass of projo opens with one hand without worry) the least is the little hook at the lyre parrot that prevents the position, you must return it and is played around the length of the cable of power supply (an extension cord and presto!) or nothing wrong.
Q / P excellent.
I do it again this choice without hesitation.