Amazing module indeed. I've installed it onto Joomla 2.5 within seconds. One module with so many variations! For those who love to edit styles to get a particular look this module offers so much freedom in presenting your articles. Perhaps the backend could be a bit simpler but the amazing support from the developers page made up for everything. A huge forum with really helpful staff and a Wiki for their products will answer any question that you could encounter.
Joomla is like peanut butter and GK4 modules are the jam, a match made in heaven!