I had to return three mbp's to my local apple store. After the third, they were still willing to do yet another exchange but I opted to just get a full refund for my money. I'll head back in a month or so and try again. I was just too disgruntled with three flawed books in a row. Anyway, idk if they can tell if you've returned the book before. Unless the person you're working with has seen you before they probably won't know. And don't let them give you any bs about how "they are all like that." If you're having issues with your trackpad, no, they are not all like that. All three mbp's I got had perfect trackpads. All the mbp's I got however, had wapred lids. One had a faulty optical drive and two felt like there was something clunking inside teh case when picked up. I mentioned the warped lids when I brought them back in addition to the other problems and they tried to pull the ol "they're all like that". That's not true, maybe all the ones I got were like that, and maybe all the ones on display in the store were like that but I know there are people who have gotten books with non warped lids. You payed a lot of money for this product, so if there is any defect or imperfection that bothers you I think you have the right to take it back.