Be ready to spend some time experimenting
I'll lead of with: I like these a lot. The open-backed design provides a unique feel and sound. The packaging is great, comes with all that you need, well laid out. These DO require some time to experiment with the various lower and upper ports/filters, as each of either can change the shape of the sound you get overall. Still breaking mine in, so won't go into further detail. Reports indicate that over time the sound does continue to improve.
Would recommend to a friend.