I am days away from a decision to move from my rMBP 13" 2012 to the new tbMBP 15", I am primarily going from the 13" to the 15" for the extra screen real estate and productivity gains that come from it. I will still carry my iPad Pro 12.9" for media consumption, light email, etc... Can anyone in this forum say something positive about their 15"? I have gone page by page and everything here is negative, battery life, performance? I need some reassurance that I am going to be happy with my purchase. Thank you!