iOS 7.0.4 is decent. I turn off the animations and boost the contrast and stuff, and disable apps running in the background. I don't like how it feels like an Android knockoff. Still not a big fan of the white/outlines/etc. design, and how all of the apps are switching to "thin bar" buttons/nav systems (like Camera+). Control Center is probably my favorite thing.
It crashes less now, especially the OS - individual apps still have more crashes than iOS6 though. I've also had more problems with the camera, either resetting to the Apple logo or simply not opening. Especially when it stitches the panorama together, I see a lot of crashes. It's still a Russian roulette game as to when it shuts down - anything under 30% is fair game. I've had it shutdown at 1% and I've had it shutdown at 24%, no rhyme or reason. I need to put that new battery in