I also got the AMPS. Spendy, but they come down more (and out more) than any others I've seen. They enabled my wife to get into the truck, even when recovering from a knee replacement.
The mechanical installation was quick and easy, but I've had very little experience with vehicle wiring. I took it slow and carefully followed the detailed instructions and (voila) they smoothly went down when the front or rear door was opened, and the cool LEDs came on just right.
They seem to be pretty clear of slush when driving in the Wyoming snow, since they cozy up to the rocker panels when you're underway. I'd do it all over again, even if my wife didn't need the ease of entry.