those aftermarket steering wheel adapters are useful if you want to have an eye pointing to the HU. The way they work is, you wire up an IR transmitter to somewhere it can see the HU (line of sight) then wire it (tap it) to the cables coming out of your steering wheel controls and the functions are limited (usually similar to stock setup) what I would look for if I were you, a HU with wired remote control input, then get wired set up instead of IR transmitter set up where you would have wires all over the place or drill a hole on your center console..
I checked the installation of one of those, it is a hassle......