No experience of Pioneer headunits, but my Kenwood is not great (DNX 9260BT). Screen colour sometimes goes flaky after having the removable face off, sluggish user menus, and it's been back to manufacturer once to fix another screen freezing/crashing issue.
I'll never buy another Kenwood head unit again personally. Would probably go with Sony myself as I've had/got a lot of their stuff and it's always top quality.