Ok, I jumped into the pool with my blackberry 8330 curve with the 5.0 operating system. I am proud to say I went back to the 4.5 OS. I found it slowed everything down on me, and I also found out that you lose the GPS with the blackberry maps. There are some bells and whistles with the 5.0, but like I said, I couldn't do much because it slow down my system. In conclusion I must say this, if you want the 5.0 upgrade be willing to sacrifice some of your third party programs, for I strongly believe that the 5.0 consumes a lot.