Funny... just the opposite experience at my house... I don't have "Blast" though; picture quality is worse, internet is slower and varies wildly, sound / dolby digital is definitely much worse and we all hate the interface ( we don't use voice) and reliability is not nearly as good... At the time I saved $50 / month by switching to Comcast. Would switch back in a minute if I could do so for the same price or even a few dollars premium... might just be the signal etc in our neighborhood, but everyone here feels pretty much the same way.
Tried to switch back just a few weeks ago and the closest I could get price wise was $42/ month premium since I wanted a multi room DVR and have 4 TVs... and require HD; the NHL, NFL, BBC, History Channel, SYFi, PBS, GET or Decades, Oxygen (Artful Detective) and a few others in my house.. and I'd sincerely miss Bill Maher if I didn't have HBO!