We have already built several switches of this type in the house and are very satisfied. Toll on this timer is the good price / performance ratio, the automatic switch from summer to winter time and back. Especially great is the Astro - function. There are no corrections to the up and down times of the shutters longer necessary (especially in the transition periods of spring and autumn, this is often annoying) .On some switches of this type, we have additionally sun sensors installed (accessory), which is mounted on the sunny side, excellent services do (automatic sunlight shutdown of the shutter until the predetermined height). The Inetensität of sunlight, leading to the departure of the roller shutter is individually adjustable. GREAT THING! All in all, highly recommended this timer.