Overall this was a good product that does what it says on the box. The product is designed to fit into a deeper than normal double socket size box but I got it to fit in a standard depth box with a couple of cut out modifications. One issue that is not clear at time of purchase is the power supply. It has a very short lead to connect onto the box which is impacted by a cylindrical device to cut down cable noise very close to the end - this was difficult to hide in a wall. The other issue is with the size of the power block that is certainly not designed for burying in the wall. So, whilst the amplifier and BT adaptor fits neatly in a wall, the power supply is not. I ended up extending the low voltage side of the power supply and placed the power block in the ceiling. As the power only requires a 2 amp supply I took the supply from a suitable fused spur from the lighting citcuit. Without these complications I would easily score the product at the highest level.