I don't think I could use less than a 12" screen, that being said I love my 2014 13" MacBook Air! It's a great size, and super light, making it ultra convenient for taking it to class with me or just using it wherever, whenever. I do have to say that I wish I would have gone for the i7, 256GB, 8GB RAM Model, but I decided to save about $600 at the time by getting the base i5, 128GB, 4GB RAM Model.
I don't notice any major slow downs by the 4GB of RAM, but it's mainly because I don't play too many major games or use really beefy programs.
I don't notice any major slow downs by the 4GB of RAM, but it's mainly because I don't play too many major games or use really beefy programs.