Yeah I like Lock Calendar. Its great and light weight. I had intelliscreen a while back and it just seems to be too buggy all the time and eat a lot of battery. Lock Calender is nice and simple. And the new beta has color options and such that make it better.
Also I used to not like winterboard due to the probably similar issues a while back, but I decided, after looking at the change log, to give it a try and i must say it causes way less issues and is much faster and easier on the battery than it used to be.
The developers of rockyour phone say:
Note: Currently we require the soft unlock in order to install the Rock.app on your phone. We are working on an option for existing Cydia users to install the Rock.app without the need to perform the soft unlock.