It's a great no fluff shooter that is timeless in the sense that its main appeal is a perfect refinement of old school basic FPS gameplay - its just all about aiming ability, team and map strategy.
But it should be F2P. I bought it, but I'm not really sure what I paid for, all the guns and skins cost extra. Good thing it's super cheap.
I think a major part of its appeal is that it's so popular. There's no real fear of not finding a match 8 months from now.