The headphones include a free (older) version of dSoniq Realphones which works surprisingly well. A little problem with the software registration was solved by ESI immediately (in fact, they've always been very responsive and quick).
The phones are confortable enough in order to wear them for some hours, and while there are more comfortable ones out there, in this price range they are on top of the list.
My only gripe is that you can't detach the cable from the phones, and I'm not sure how long the cable will last. It doesn't appear to be extremely cheap but it's not Sennheiser quality either.
All in all, if you want to dip into headphone simulation software with a dedicated matching pair of cans, I can highly recommend this product.