Very widely reviewed at this point, and largely considered the closed back headphones to buy for audio quality under $400. Comfortable, light, fits most head shapes and sizes. Build is flimsy if you want to throw it in a bag without a case, but otherwise it's a great headphone for daily use if you need the basic passive isolation a closed back provides.
Sound is an excellent take on Harman neutral, with a nice sub-bass kick and great timbre and good soundstage for a closed back. Treble is its weak point, but it's still above average and not harsh or brittle, just not quite as well executed as the mids and bass. Overall a really great execution of AKG bringing their house sound into an affordable closed back without making it too dry.
Might be worth holding out a little longer for cashbacks on/near Prime Day. See previous deal listings for comparisons and reviews. Enjoy!