First off I'd like to say this unit works excellent. The remote fobs are excellent and the range seems to be pretty darn good.I installed it into a 1996 F250 with an OEM non remote power lock setup. Power locks are nice but without a remote setup their usefulness is somewhat limited. I did a search here on Amazon and came up with this setup for far less than I expected. After reading many of the reviews I knew the instructions would be lacking but decided to give it a try anyway. I'm glad I did.This system isn't super advanced but does offer a couple of features other than just locking and unlocking the doors if you choose to use them. One feature is the notification system. The system shows a wire being hooked to the "direction light." This wire "flashes" once for lock and twice for unlock. The idea is to connect this to your outside directional lights to give you a visual indication that the system either locked or unlocked the doors. I didn't utilize this feature but if I did I think I would connect it to the horn instead of the lights. Just a way to confirm to myself that I did indeed lock the doors before walking away. There is also a wire for unlocking the trunk but with the exception of a label in the instructions there is no indication as to whether this is actually active in this system.A feature that would be nice is to allow the user the ability to "setup" some features. One feature that some may like is to allow the user the ability to change the output of the "flash" output. I would prefer one flash for unlock and two for lock but there is no way to change this. For the price of this unit though it would be hard to really fault this system for its "basicness."The last issue here to discuss is the instructions, or lack of them. The reality is that it would be very difficult to include very extensive instructions because each installation is going to depend on the model of vehicle you are installing this into. A better layout of the basic drawings would be nice though. It took me a little while to figure out exactly how the diagrams related to the included unit but I did figure it out. By far the more difficult part was coming up with the vehicle specific diagrams. the service manual I had included the wrong diagrams and therefore added a lot of work to this installation. That is not the fault of the maker of this unit though, that is a problem with my service manual.Overall I would highly recommend this unit to anyone who feels they can figure out the wiring. If wiring diagrams confuse you and vehicle wiring scares you, then I recommend you either buy something else or have this installed by a professional. Personally I think it works great and was well worth the effort to figure it out.