I've heard so many bad things about Rock, mostly about its producers and the apps shoddy code etc, but out of interest I installed it yesterday. I haven't had a chance to compare it in-depth to cydia, but it certainly doesn't seem too bad at first glance. It's got a nicer design than Cydia (that's a personal preference of course), and is much, much faster. The speed seems to be the greatest benefit to me. Now, is there a reason I can't run the two installers side by side? If they use the same repos is there really a problem? Can Rock cause problems with Cydia, and vice versa? I realise this has been asked before, but I found a lot of contradictory information when I searched on the web, and a lot of hyperbole mixed in with fact. Thanks for your help.