I bought my KSO's about 2 weeks ago and love them. I don't really run distance but do a lot of sprint work and I love them.
Definitely take your time breaking them in and you'll never want to wear shows again. I wear mine to work, grocery store and everywhere in between.
Today is a new day. You will get out of it just what you put into it. If you have made mistakes, there is always another chance for you. And supposing you have tried and failed again and again, you may have a fresh start any moment you choose, for this thing we call 'Failure' is not the falling down, but the staying down.