I have agree in respect of how slow some of the apps open but like others I think this in some part is down to Yosemite and expect improvements with El Capitan (at least I hope). I wouldn't go as far as to describe it as painfully slow.
Battery wise, after reading helpful threads on here I found improvements using Safari with uBlock instead of AdBlock and ClickToFlash. Overall for the size and weight of the laptop I think the battery performs quite well and don't really pay much attention to the monitor throughout the day if I'm honest.
When I use my old 13" MBP 7.1 it feels like a brick in comparison, a well built one but I really notice the difference. I used to carry this around with me most days and never thought it was too heavy until I starting using the rMB and for light mobile computing use wouldn't want to go back.
Jack
Battery wise, after reading helpful threads on here I found improvements using Safari with uBlock instead of AdBlock and ClickToFlash. Overall for the size and weight of the laptop I think the battery performs quite well and don't really pay much attention to the monitor throughout the day if I'm honest.
When I use my old 13" MBP 7.1 it feels like a brick in comparison, a well built one but I really notice the difference. I used to carry this around with me most days and never thought it was too heavy until I starting using the rMB and for light mobile computing use wouldn't want to go back.
Jack