I manage to do it intentionally versus predictable kickspammers, but apart from that it's rather difficult. Can you actually chamberkick while you are doing an attack? The normal kick rhythm is them doing an attack, you blocking, they press kick during your return attack. So if you can't it's really hard to ever use properly.
A chamberkick is a kick that happens to be in the early stages of the animation while you are being hit by a kick from someone else. So you have to be standing still.
Doesn't pressing the kick button stop you and make you kick regardless if you were moving or not? Again, if not it's really going to be hard to use properly.
I've had tons of occasions where I pressed kick at supposedly the right moment but nothing happened. I think you should be able to counter kick even when you are moving and attacking, the counter kick should just cancel these and kick anyway. Not sure if this is the case now. Otherwise I don't see this going be useful somewhat reliably.