i have EQ5 installed and i'm very happy with it.
i have EQ6 and i haven't installed it yet. it was a gift from a friend and i have a serious problem with only being able to install it 4 times.
had i actually installed the software when i rec'd it i would have used up my last installed 2 weeks ago.
this isn't software that you own - you're renting it for 4 installs and then you either pay more money for more installs or you don't have the software any longer.