My best tip would be, go in with a positive attitude. The workers here are people just like you who are dealing with frustrated customers as well as pleased customers. Exceptional experience.
Ari spent lots of time with my family patiently helping us choose the right products and understand how to use them. I'm a bit of a power user and he gave me great tips too!
Had to return an "Eastern Collective" chg cable. It only worked w/ the wall plug, it kept shorting when plugged into the computer & car. Returned it for the Apple Cable which was even $4. Cheaper.