It is actually a lot of fun, I've been playing since the closed beta and really recommend it. The best part is that it's free to play, so you spend a grand total of absolutely nothing if you just want to try it out. Even if you own Overwatch, at least play this game before calling it a ripoff, form your own opinion. The game's also really well optimised, it can probably run alright on most systems.
If you do decide to try it, it'd be really cool if you used this link when creating your account:
That way we'll both get some rewards for playing in the shape of in-game currency and exclusive