There are also a lot of valid concerns in these comments about privacy and use of algorithms. A lot of it depends on what you’re looking to gain by adopting a new service/switching away from something else and individual concern.
Personally, I’m looking for a place to store personal photos: friends, family, travel etc. Critical needs - easy sharing ideally not locked into Apple’s ecosystem - not to have my photos mined for advertising and social graph data (most important) - ideally around for the long haul but in my mind this is for sharing, not backup
I’m not particularly concerned about warrants, government surveillance etc. Again for me this is about sharing so the expectation of true privacy is low. Any photos I considered sensitive I would store elsewhere.
For me, the biggest point of confidence I have in this project is that they charge money from day 1 and don’t have a forever free plan. I’m excited about projects that offer the benefits of “social” but where the software, not my data, is the product.