Good open back headphone, I recommend checking reviews or even better listening to them before purchasing them. But if you've been waiting for a discount on them, I think this is the cheapest they've ever been.
IMO the build quality issues that people report with them sometimes would drive me away, but it is from Amazon so warranty should be great and they're easy to deal with if something goes wrong.
Also 30 Days money back guaranteed pretty much if you're not satisfied with it.
If you're paying around $600 for a headphone though, might as well stretch the budget a bit and get a Focal Clear for example from Addicted to Audio for $799 as it's the cheapest in the world on a discontinued product that's very highly rated.
Focal Clears went out of stock at A2A weeks ago.