I love this controller. Does everything I want it to and was easy to wire up. Its not preassembled so you can customize it to your vehicles needs. Everything is high quality in this kit, you will need some extra zip ties though (I did). The only part that I don't really care for too much is the temperature probe. You have to squeeze it in between the radiator fins and then its a hard wire into the control box, I wish it were something else like a low profile probe that could be stuck inside of a radiator hose, with a flexible wire back to the control box. No biggie though it works well, just a preference. If you opt to use the manual control switch from flex a lite be aware that you need to wire it according to the instructions that come with this control box and not the instructions that come with the manual switch, it will blow the control box (Learned the hard way). If anybody from flex a lite is reading this please fix this error or place a warning or something.