You are getting shafted. If you upgrade to the 256gb SSD it is the same price as the base 15" rMBP. Only difference is you get integrated graphics that struggle to run on the 15", no amazing gpu, dual core instead of quad core, i5 vs i7, inferior speakers to the 15" and a pound lighter. Like another person has said you have to be a 75 pound anorexic women if your going to struggle carrying a extra pound around. Seriously the 13" is seriously lacking, terribly overpriced and extremely inferior to the 15" rMBP. If I were in your shoes I would immediately return the 13" and buy the 15".