Hello, I was wondering whether I can get some quick advice. I am considering selling my MBP Mid 2009 15 Inch (tech specs here: http://support.apple.com/kb/sp544 ) for around $500-$550 (comes with accessories) and buy a MacBook Air 2014 13 Inch, since best but is having a sale right now. I just don't know whether technically downgrading from even an older MBP to a MBA is worth it? Likewise, I don't know whether to hold out for a possible retina upgrade this fall or refreshment of the 13" MBP. But my current MBP is depreciating in value, so it might make sense to sell it and add $300 to buy a new MBA. But my basic question is whether you all think switching from a Mid 2009 MBP 15" with a 2.53 ghz Core 2 Duo processor to a 2014 MBA 13" with a 1.4 Ghz i5 Haswell is worth it? Any opinions are appreciated! Thank you! *** Update **** So I don't do anything hardcore on my laptop -- at least not anymore. It is primarily for school, travel, and work. 90% of my time is spent on excel, or word, taking notes for school (current student at USC) or working on spreadsheets at work. I do sometimes use iMovie, and Final Cut Pro (very rarely); that may be an issue. I am an amateur photographer, but do photoshop on my desktop. However, I travel a lot, and walk a lot around campus, so the only true benefit to the 13" MBA is it's weight. The Mid 2009's are heavy in comparison.