Very easy to set up. They go together easily and YES you can probably put all 4 sets together BUT the light will be dim on the 3rd and 4th set. In the attached instructions it is recommended to connect only 2 sets in series. The HF box has 4 extensions extending from it to theoretically connect directly to each of the 4 sets of LEDs. It is important to plan for the location of the lights and proximity to the outlet if you want to use all 4 sets at the same wattage. The board worked fine. The app worked great on my Android phone. I didn't really experiment with the music function, although the microphone on the RF adapter was sensitive enough that the light went on and off when I clapped next to it in music mode. The glue seems to stick very well. The paint will peel off when you try to remove it. I put it around the molding with glossy paint and it didn't seem to chip like the flat paint on the walls. I've only had it for a few days but am happy with it so far. However, I wish there was a way to chain all 4 sets in series and keep the same level of brightness.
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