sure, they use the same drivers like the 558/598 have.
they tend to let more sound into the room (vs closed case most others do), but it also prevents your ears from getting hot (like with closed cans), and sound is more "airy".
most ppl dont like the flat sound (missing a bit bass), but thats mainly for music and you can just use the EQ in your music player.
one thing:
as with most good cans, let them run playing music for about 24h (changing type of music with every other song if possible)
they wont produce "correct" sound until then, and if i wouldn't have known that, would have returned them the next day..
Update:
friend of mine (Pvp player with clan in top 10 for germany) wanted to replace the HD 518 he got from me.
he tried the tp models from logitech/astros/corsair from 2.0 to 5.1,
returned all of them and is now back to the sennheisers and ordered the GSP 600..