Studio One 2 is fluid and intuitive and doesn't get in the way of my creative process during music production.
I'm not a presonus fan, especially considering how almost every presonus unit I sold at sam ash got returned, so I stopped selling their crap, but their DAW is simply amazing.
Looking back, I think the problems their hardware had was probably due to a firewire chipset issue, but at the time I had no clue what that was, only that everything was being returned, but I digress