These earpads were a godsend after the cover on my original Bose ones split and the foam was starting to fall apart.
They are definitely a little thicker than the original but seem more comfortable, noise cancelling and sound quality is just as good, they also seem cooler as well.
They are reat and I'm glad I chose them, fitting was fairly straightforward but you have to get all the clips in at the same time which was a little tricky on one side! Now they're on they seem secure so I hope for long lasting comfortable listening :-)