Now that psn is down for me i'd consider playing thief
Worth it?

It's a solid 6.5/10. Has some fun elements.

if you like firstperson sneak around and steal everything you can.. then yes its fun...
Thief was my first game for PS4 and I still have it

I personally really enjoyed it. I'm usually really picky but in loved it once I got past the learning curve.
The biggest pain is no fast travel and the map can get really confusing. Once you learn the map though it isn't so bad.
Definitely try it to see if its your thing.