Adding SKS-Like abilities?

I've been moving a lot of equipment for work and I've come to realize that often I have to put down a bunch of heavy things to dig my keys out of my pocket. Obviously I regret not getting a Prius with the SKS system.

I've been looking into getting an aftermarket alarm system with passive keyless entry to emulate what the SKS system offers.

What do you all think of installing a product such as this one?

Looking at some instructions I found, it doesn't seem to difficult to install. Any experience and input with these sort of systems would be greatly appreciated!