Yes. I'd been waiting a little longer to post. So, first off, the headphones are great for bass. There aren't a whole lot of bass amp models, but the ones that are there are pretty good. I also like using the bassman clone, even though that's more known as a guitar amp these days. The amp and cab sims are very good. There are also a lot of bass specific effects built-in.
Now to the bad: on my active basses, there are varying degrees of interference noise when using the included wireless adapter with some of the built-in effects, particular those with high gain, compression, or overdrive. However, you can plug-in (wired) straight into the headphones, and that eliminates the noise. You can also use a 1/4 jack extension to get the adapter farther from the preamp, and that will eliminate the interference too. My passive and piezo basses don't have the interference issue, but both of my magnetic pickup active preamp basses do.
For better or worse, the headphones are closed back, and very isolated. I can't really hear the outside world if I'm playing music through the headphones. Battery life is a real world 6 hours or so, so plenty of time.
For quiet practice, it's a great option. You can jam along to any music you have on your phone via Bluetooth, and it even will pick out chords to YouTube videos. The software will also autocreate a backing track that you can jam to as well. Overall it was a great purchase. I don't have the boss katanas to compare to. But I like it very much.