6+ love it. Its not any bigger then any other phone I see people using. Example my sister has a Galaxy S5 with a case on it, it actually looks bigger than my 6+. The Galaxy is still a little smaller though. My sister said to me "that phone is huge" and I said "its the same size as your phone". THAT was the last time she said anything about it. I have seen both the 6 and the 6+ in the wild its about 50/50. My mom has a 6 and for her its great. The wife has a 5C and she loves it, so everyone is a little different. I do think that if they made a pink 6 she (the wife) would want it.
Um
http://www.phonearena.com/phones/size#/phones/size/Samsung-Galaxy-S5,Apple-iPhone-6-Plus/phones/8202,8908