For now mine seems to work fine. I gotta tell ya, I'm installing all these tweaks but what sux is that now we're stuck on 5.0.1. Not only that but you get used to these tweaks and who knows if they'll be able to jb iOS 6 and the next iPhone which I plan to buy as I expect it to be a major upgrade.^I hope you have better luck with Gridlock than I did.
It placed my iPhone4 into Safe Mode and it had to be removed before all was well again.
That was just a few days ago and the Cydia Compatibility chart also confirms it isn't dependable.