Well I'm sure the apple store hates me but had the 13" and although very thin was missing that ultra portable feel for surfing in bed, carrying around etc. so returned for the ultimate 11. No go with the 11" for me - I just found that the smaller screen real estate and battery drain was a deal killer for me so returning the 11" and going back to the 13" as a keeper. I was a bit surprised at how much faster the battery drained on the 11 than the 13. I also found the speakers to be marginally louder on the 13". If all your doing is surfing the net 11" may be ok but iWork apps, photo work, and most everything was a bit tougher to do and see on the 11". Unfortunately I just couldn't tell comparing at the store. It wasn't until I got it home and loaded my apps like photoshop but I am 100% confident in my decision now. I know that others have different opinions and feel the 11" is perfectly fine for everything but I can live with the minor size differences to get the added screen size and battery now that I have tried both extensively. Hope this helps for anyone who is struggling as much as I was with the decision.