My Canare with Amphenol Heads, bought from Beez, have lasted for 3 years.
He gave me an example, took his ages old canare and started twisting it in very bad ways and hammering it. Still works. So my 3 years is still pretty amateur.
I've seen my friend with boots step all over the head while I thought to myself, oooooooo.
It still works perfectly though.