Good to hear. I just got one of those 12-30 cassettes and I was hoping I wouldn't have to get a new derailleur. I had some problems with an 11-32 with my old Tiagra 9-speed rear derailleur. It nearly worked, but bounced a bit in the big cog. The rear derailleur I'm intending to use now is the Ultegra SS model (capacity = 29), but I'll be using it with a 46-34 crankset, so I think I'll be alright.