I just picked up one of these MBP's last week, and I got windows 10 working via Boot Camp. Are there any long term issues from using Windows on a Macbook on the battery or GPU, CPU, anything like that?
Nope, its just an operating system. Windows doesn't have the same level of power saving built into OS X, so you may see less battery performance but overall there's no long term effects.
I had windows 7 and that wasn't as good battery wise. Since then I've largely moved onto a SP3 for my mobile needs and thus there was no need to keep windows on my MBP.
I had windows 7 and that wasn't as good battery wise. Since then I've largely moved onto a SP3 for my mobile needs and thus there was no need to keep windows on my MBP.