Got mine this weekend. It's size is almost laughable enough to not annoy me. But ultimately, it still does. Also my disk drive makes an awful buzzing sound for a few minutes when it's (presumably?) reading off the disk. I've read online that this is normal, but man does it sound horrid. Overall I'm not a huge fan of the design. Controller feels amazing though.
Other than that, it's wonderful. Days Gone and God of War in 4k/60fps (I think) look and feel so smooth, as is everything UI related. The PS Plus collection has an absurd amount of gaming goodness in it. Very happy with it in all ways except for it's size and that disc drive sound.