I installed my pro kit springs about 8 months ago and they've slowly settled slightly over time. I had an alignment and my camber was .04 off on all sides...so its not bad. There really isn't any irregular tire wear thats noticable. I might get a camber kit just for the sake of getting one, but its not really necessary.
You should get the camber kits, it'll help out with saving your tires. But like always it's up to you to make the choice. I personally like the way it looks with the wheels standing straight instead of leaning in at the top.