I'm a huge apple fan. I love my iPad Air and iPhone 5s. I've used windows all my life. I'm tired of the constant battle against spyware and viruses and have always been interested in Apple's Mac products. I found last years non retina 11 inch screen MacBook Air refurbished on Apple's website for $729. Is this a good deal? How does it compare to this years air?' Coming from an iPad and iPhone will the non retina be hard to get used to? What are some things I could do with it since I already own and iPad and iPhone? And generally how long do MacBooks last? Thanks in advance.