I have this head unit with that steering wheel control and it works great! No delays except a very slight one with Bluetooth only.
Just make sure the firmware is up to date on the Axxess otherwise you will get random/intermittent Source and volume changes. (known issue with Axxess on ALL head units) If you buy a new one today it SHOULD be up to date, so no issue unless you buy a older used one. But if you need to flash it, its easy you do it on a PC with a special USB cable you need to buy.