Photo/video management with Google photo

I'm curious if anyone is using Google photos as an option for photo/ video management. I definitely don't want to use Dropbox or box due to you can't upload folders how they are organized according to how you want them. Also Google give unlimited space as long as you agree to 16 mega pixel limit to each picture. I looked at most of mine and I don't have any that exceeds that limit.
1. Does these photos go to your Google plus profile?
2. How easy is it to download the original picture?

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