Good product. It looks and works exactly how it's described. I'm only giving it three stars because none of the lights can be replaced over time. I bought a house where the previous owner installed a similar product 10 years ago, and ALL of the track lights burned out at once. After 10 years, that item is no longer available, and I would be required to buy a whole new light fixture. Where is the sustainability in that? 
Luckily, this light track kit is a similar product. I only needed to hook the new light heads on my old track, and it worked! Unfortunately, this is the ONLY comparable product. I can't find any other integrated LED light tracks online. Who knows if these type of fixtures will be around in the next 10 years? 
So do yourself a favor and buy something with replaceable light heads or you'll just throw this light fixture into a landfill in 7-10 years and have to patch up your ceiling for a different light fixture. So dumb.