

Cydia is still my favourite. I've had problems when installing stuff through others.
Cydia was always my favorite too, even back when it was Installer's much younger competition. But I must say that I'm impressed with Rock. Not to mention that Cydia has been giving me grief all afternoon and ROck has been, well, rock-solid.
I just used Rock for the first time to download Backgrounder. I was having network connection problems with Cydia so I figured I'd give it a try.
Rock lives up to their advertising- very fast. Starting to dig around a bit now. It has a nice UI. Lots of graphical improvements over Cydia that don't seem to slow it down at all. So far, it seems basically the same as Cydia, but with a facelift.
Does Rock track prior Cydia purchases?
I much prefer to use tested and open solutions like apt/Cydia/MobileSubstrate to proprietary installers. [...] I would avoid Rock altogether.
Although I was pretty sure that as of Icy this line of installers did start using APT (which is why having both Icy and Cydia on the same phone simultaneously is generally a bad idea). Maybe it's just that it uses .DEB packages, but doesn't use APT to track installs/dependencies, and I've simply conflated the two?