So, I have this friend who previously had a 2013 MBA, then returned it to Best Buy and purchased a cMBP (brand new), now she is having 2nd thoughts again and wants the MBA again. She's asking me for my advice and I already told her that she shouldn't have returned the MBA in the first place. Now she's complaining about her new cMBP only getting 2 1/2 hours of battery life. She says she wants to return this and get the air again but she's scared that she just won't be satisfied with the air again and might return it once again. What should I tell her to help ease her mind? She's still in the 15 day return period at Best Buy so she could still return it for the air again. Thanks.