If they are like the commenter below I'd say very poor. (Joking of course)
My perception after over a decade with Apple is that quality has indeed dropped lately (based strictly on the bugs I've personally experienced recently, I have no idea nor claim to do so on the bigger scale, I could very well be just unlucky).
Maybe if the employees were doing their job and fixing things instead of moaning in forums we would have better products, LOL.

(I'm still joking Deuce so please don't go all sensitive).
Oh well, I'm still not bothered enough to change platforms yet but I must admit that the thought did cross my mind for the first time, then I saw my friends android and Windows PCs and I calmed the **** down.