"If you plan to use Google Photos to store your photos, here's another review that will be helpful. Although I'm not the photo buff in our family, all that I've read seems to say that Google Photos is a great program to try out. Since it's free, what's to lose?" says Jim Hamm. See here, http://www.wired.com/2015/06/coolest-stuff-didnt-know-google-photos but read page 3 carefully under "Licensing" and note the ToS, Terms of Service. You have been warned and this applies to all of Google's services.
A Few Days With Google Photos
"Here is a review of Google Photos that basically gives it a "'numbs up.' If you have pictures stored somewhere, you may want to look into storing them in Google Photos as well." These are Jim Hamm's brief comments, but take a look here:
https://medium.com/@ahatzz11/a-few-days-with-google-photos-5b858af6d13c
Google May Have Won the Cloud Wars
Here's that word FREE. "For the storage of your photos, Google Photos is free, has unlimited storage, and is available on iOS devices. What's not to like about this scenario?" asks Jim Hamm. See http://bgr.com/2015/05/28/google-may-have-just-won-the-cloud-wars-with-google-photos/ and take a look at this article, dated 5-28-15: http://bgr.com/tag/google-io-2015/