Positive Grid Spark Neo

Spark Neo is really the best musical purchase I've made for ages.

While there's nothing very magical about them, the manufacturer waxing poetic about the "AI features" almost made me want to skip buying them, and I can't really talk about the quality of the guitar amp sims as I use the headphones solely with bass... it's just so convenient and fast to plug in the transmitter to my bass, turn the headphones on, pick a practise drum track from my phone and start jamming / practising anywhere in the house right away. No need for extra setup time, no cables dangling around, not tethered to a single spot.

It also helps that the tone I get out of these is very good for what they're meant for, and the instrument latency is imperceptible for me. I don't know if I'd use the Sparks as my first pair of casual listening BT headphones (they do work for that as well), but there's a very nice punch, energy and connection in the sound that makes my head nod while practising fingerstyle lines on top of funky drum loops - and that's a thing that's lacking from a lot of small practice combos I've owned.

Any nitpicks, then? Well, the headphones themselves are not the most comfortable for my head - but luckily they aren't awful at all either, just the "tight and sweaty" thing you get from a lot of sealed cans. Build quality feels fine in all respects, but not spectacular. I don't expect them to fall apart in my hands, and they feel fine for moderate practise periods -that's way enough for me for this price range and with such a brilliant utility.

I've got this as a replacement for Boss Waza Air, since I really got tired of Boss' poorly made mobile app. Spark app is very good and has a lot of useful features. Plus my Waza Air sometimes had connectivity issues, when trying to connect transmitter with headphones (also it had obsolete micro USB as a charging port, yikes!).
Spark Neo resolves all of that - connection is very stable, app is superb. However, I still think that Waza sounded better, especially on mid and low-gain. Plus it had neat spacial audio feature, which Spark does not have.
I also liked that Boss had 5 presets available, while Neo has only 4. This thing also does not have individual volume controls for guitar/bluetooth audio, so you have to adjust volume of backing track using your phone.

Considering that it's MUCH cheaper than Boss Waza, I would rather go with Neo.

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.