I've been working on a 13" MBP (2015 base model) for the past couple of months. I don't own it, but I wouldn't want to. I think that's probably the #1 reason why I'm not willing to look at models earlier than 2016. At 100%, the screen feels like it's at 90%. Comparing it side-by-side with my iPad 3, the Macbook Pro 2015 13" at 100% brightness is as bright as the iPad 3 at 90% brightness. The iPad 3 at 100% brightness looks great, but the 13" 2015 rMBP can't reach that.