I recently bought and installed the stabilizer. It made a big difference. I just got the cheaper V1 or whatever it was though.
Its not hard to install, but you'll probably find out as I did, that the A arm bolts aren't that long. The factory, or the crap from RC, and you will probably have to track down a special bolt, or order one.
I kept the factory bolts in the A arms, and used the RC hardware, to mount the drop. The factory washers have a lip that goes to the inside, and it also ends up being the correct thickness to space the stabilizer bracket.
The bolt you will need is an M16, and 130mm long works. In other words M16-130. I ordered a grade 12.9, and it wasn't really cheap for one stupid bolt.