I've been there a few times and have mostly found this store to be helpful. I was there with a Mac notebook that wasn't starting and the Genius Bar person I worked with was able to fix my problem. He explained everything he was going to be doing clearly and though my computer's fix took a while, I left with a computer that worked properly and didn't lose any of my data like I was worried I would. The store tends to be crowded and noisy, especially on weekends and around holidays, but my experiences with this store have been mostly positive.