I recently purchased macbook air and I really satisfied with the product.It has a 13 inch display and a very good battery life.The battery life is of around almost 14 hours when used normally and around 9 hours when used continuosly.It has the 5th generation core processor and faster flash storage.It has 4GB RAM which can also be further upgraded to 16GB RAM.I would recommend buying macbook air.It is a must buy for all the apple lovers out there.