I'm also thinking about dipping my toes into iCloud Photo Library. I went ahead and earlier today bought the 20GB for 99 cents thinking that once they do change it to 50GB for 99 cents, worse case scenario, I could cancel my current 20GB plan and re sign up for the 50 GB plan. I hope o don't get burned by thinking that lol. But this iCloud Photo Library stuff is really concerning to me as I don't want to have to upgrade storage beyond the 99 cent range... And I'm unsure if all the photos will fit in 20 GB storage or even 50 GB storage. I can't find a way on my iPhone or iPad to check to see how much storage my photos are taking up locally, I wish there was though because I'd like to "go all in" and still have room left for my backups. I have just over 4,000 photos on my phone and about 3,500 on my iPad. Anyone have any idea approximately how much iCloud space those would take up?