I purchased mine from etooldirect and was pleased with there customer service.
LAUNCH X431 PRO WEST COAST PLUS
In short this thing to me was worth every penny and will be paid back in just a short time in the amount of time it saves me plus the functions I would normally send out to the dealer to have performed like key code, module initializing ,and immobilizer. It doesn’t mention it but with the cables it comes with it has serious coverage in pre 96 cars that have under hood plugs and in cabin plugs. This product is still to the new side of there products so still taking input from users to fix bugs and add new functions but updates are looking like average 600 or so per year. This thing has to many functions to even began to get into but I do have to say I love the transmission control module functions so much faster to diagnose problems in the transmission. You can also select your own set of values to monitor and if you want pick two at a time to graph. I also love the wireless functionality that lets you move around and work while still easily monitoring the values.
LAUNCH X431 PRO WEST COAST MANUAL
This product DOES NOT come with in depth manual but is quick to learn or if you are using it with a program like alldata you will pick it up quick. I have hardly been able to put it down since I started using it. It has good bi-directional test function.
I bought this scanner for it’s cost to function ratio and I am pleased with that decision.
This review is from: Launch Tech USA 301100119 X431 Diagun (F) Scan Tool (Automotive)