Title basically says it all. I'm about to sell my late 2012 27" iMac and get my hands on a mid 2015 15" RMBP without dGPU. I've got some questions some people here are hopefully able to answer: How is the overall OS performance with the base 15" model (mid 2015) right now? Is battery life an issue with some non-intense work? (Basically programming projects) How is the iGPU performing with some light gaming? Maybe Diablo 3 or similar? Has someone already tried the El Capitan Beta on it? The rmbp will be my main Mac and there will be a dedicated gaming machine at my place. I want to use it mainly for development, some Pixelmator fiddling and university stuff. Also playing some not too demanding games when not at home would be nice. I also consider waiting for the upcoming Skylake refresh but as no one knows when this will hit the shelves it's a tough decision whether I should wait or not. Main reason to wait would be the stronger iGPU plus some battery improvements. But will this upgrade be worth waiting? Does it make a huge difference for what I will use the laptop for? I'm looking forward to your experiences with the latest machine! tl;dr: wtb 15" rmbp without dGPU - how is it? Is the (possibly longish) waiting time for Skylake worth it?