Overall ... i am not too happy about it. I see the point that you can spread the word about great posts that could then go viral. But to be honest, i find it annoying that my feed is full of posts that i did not choose and my instinctive reaction is to ignore them, just as i ignore adverts and other stuff elsewhere on the web.
I have already unfollowed 1 user for spamming my feed and i feel in the future i will judge my followers much on wether or not they resteem. I do not like to be force fed other peoples desires to promote what they think are good posts.
I think i am going to refrain from resteeming altogether, since i do not like to tell my followers what to think and fill their feed with my post upvotes just to hope for some extra sheckels