are you taking clio 2? cabasse headunit is physically the same looking and same to use, sound is much better, however as above its not exactly aftermarket quality, but you can get full volume with decent amount of bass on standard speakers and it still sounds good.
my 172 has cabasse head unit with non cabasse speakers and it doesnt sound as good as my mrs 1.6 16v with full cabasse setup, so i think the speakers must be different in them too however ive never had them out and inspected.
personally if you can get one cheap enough with a code then id go for it, nice oem+ upgrade.
straight fit no wiring needed, if you have a standard cd changer then it works with that no problem too