Same as Metters, my original one 8yo is great. I also had a newer one, no end of trouble.
I have recently upgraded to a MSR XGK stove, since there is just no way of overcoming physics with the butane and cold weather. Shellite is the way to go, plus it will burn on diesel, kero etc..
Granted the MSR is not in the same price range, but I need to be able to cook in all weather conditions, in the Vic high country.
Whilst there is still a place for my butane stove, it won't get replaced when it dies.