The new Google Photos is amazing. (I work at Google, but have nothing to do with the new Photos app other than being an enthusiastic user)

They've added a bunch of good foundational stuff and some amazing magic.

On the foundations: it's fast, it supports easy link based sharing (ie, to Facebook or Twitter easily) and now supports unlimited storage for photos up to 16MP.  The old photos wasn't slow, but I have a lot of photos (about 200,000) and it wasn't exactly quick.  The new version gracefully lets me scroll back through over a decade of photos.

The face magic: The face clustering is magic.  The ability to instantaneously sift through 200k photos to find the few hundred or few dozen of a family member or friend over the years is brilliant.  The examples of effectively clustering across ages used in the keynote isn't exaggeration either; all of my photos of one of my cousins, from age 6 to age 22 are all grouped together.  All of the photos of my Grandmother, including some old scans spanning a total of 30 years cluster together.

The label magic: The content based search has been amazing for a while, but it just keeps getting better and the new UI makes discovering and using that labeling even better.  Apparently the top 6 "things" I photograph are Sky, Mountains, Flowers, Birds, Food and Forests, which sounds about right.  The ability to dive into Bowling photos (not a lot but a few over 15 years!) or Monuments is awesome.  

Really cool, and I am excited for the general direction of automated organization of my personal photos.

http://googleblog.blogspot.com/2015/05/picture-this-fresh-approach-to-photos.html