They sound great, pack down to next to nothing, have reasonable battery life and allow you to practice without any wires. Stream audio via bluetooth (the app/from a laptop/run guitar pro on a laptop/tablet). Works a treat while traveling too.
The headphones isolate well and are comfy, the app is easy to use and offers a ton of tonal options and other things (tuner, metronome, AI based tone builder, backing tracks, etc)
I wish the foot switch would work without the app (reading comments you need to have the app connected) and that it did incorporate the looper - but that would push it to 6/5 stars.
I used to own the alternative (from Boss) before and I prefer the Neos by a million miles.