Pros: Soundstage, Speed, Refinement, Build quality (it's a tank), Isolation (awesome!), Bass, Midrange, Treble, BALANCE, Removable Cables, etc.
Cons: A bit heavy, a bit pricey but worth it, not the most detailed headphones
I am apologizing beforehand, this is not a review but only praise for the Focal Spirit Professionals. Forget the B&W P7's, PSB M4U1's, Sennheiser Momentums, or as a matter of fact any portable headphones that are $300+ or below a thousand something dollars. These are absolutely amazing headphones with absolutely no flaw I can nitpick. As neutral and smooth as they are, they are still packed with fervent energy without the stridency or grain in the higher frequencies. The bass is also very satisfying with great body in the mid-bass and precise rumble in the sub-bass. Moreover, the soundstage is truly impeccable for a closed-back portable headphone. Beautifully melded sound. As a matter of fact these portable-headphones are competitive against some high-end open cans in my opinion and that speaks volumes. Lastly, I would like to point out that when listening to drums, the timbre is soo spot-on; it reminds me of the HIFIMAN HE-500's :]