I've been treated horribly by the staff at the Deer Park, IL store twice. Previously over the iphone 6 battery and slowing down my phone. There is a 3 hour wait for the $29 battery and they don't accept appts, so if you don't live local... your stuck waiting in the store with the rude stuff. One guy said he was the manager which i knew was a woman, so he lied to me. I filed a complaint online with Apple online customer service who ignored my complaint as i never received any confirmation or solution or apology for that matter. Previously over a year ago, the staff was not knowlegable and wiped my mac and phone and i had to start all over because he wrote over my backup. Just incompetent rude people working there. And how about that slowing down the iphone, the battery doesn't matter, it's still slow with a new one.