Has anyone used the Manfrotto 468MGRC2 ball head?

I'm interested to hear whether there are any issues with ball head creep. My setup will be Canon 7D with battery grip plus 100-400mm lens.

I understand it can take up to 22lbs, but would like to hear first hand experiences with such a setup.

Will also intend to mount it on a 190CXPRO4 tripod.