It's not the HX Effects, it's the HX Stomp Not quite the same thing, but still. I use it for a bunch of things: - An always on Klon for most of my presets to give me a little 'boost'... I used to use the Soul Food for always on boost into the AA3, but I really wanted to use the Soul Food as an overdrive instead. So far working great before the HX Stomp and the AA3 - The AA3 doesn't have pitch shifting, this is only on the AA6. But the HX Stomp does, so that works out for me - I can run one of the many preamp only models in the HX Stomp into the Power Amp models in the AA3. This works like a charm, sounds great! In fact, the next preset I need to do from scratch I will probably program like this - I can change from acoustic IR to overdriven amp sounds with the HX Stomp within one preset - can't do that with the AA3, besides the AA3 only has IR at the end of the chain, not in the beginning - There are a bunch of effects in the HX Stomp that is not modeled in the AA3. While I don't use a lot of them yet, I really love knowing that they are there - There are a lot of overdrive and distortion effects in the HX Stomp that I can put in front of the AA3 that are really cool and sound great. The AA on the other hand is pretty limited when it comes to modeled drive pedals - The effects in general are so much easier to dial in on the HX Stomp, in my opinion, that I really only see myself using HX Stomp for modulation, reverb and time based effects - I can use the HX Stomp as a computer interface. Can't do that with the AA3 - Last but most importantly: Snapshots. I love being able to change individual settings on multiple effects within a single preset with the press of a single button. In fact, I use this 80-90% of the time I'm playing and really spares me a lot of the tap dancing I was doing before So a lot of reasons why I love this setup and even (probably) prefer it to a larger solution like a full blown Helix LT or Floor.