I purchased this hoping it was going to be the iOS solution to my hd500 which I really like, but hate having to dig out the laptop to program. Unfortunately though the app loses connection to the firehawk constantly, requiring a restart of the app. Then if you're trying to manage the tones on the hardware you have to wait for it to load all the tones back into the app which gets very frustrating after its lost connection a few times. (I've used my air and air2 both loose connection)
Instructions for the app are very vague, I'm still not sure if you can save a tone you're creating directly from the app to the hardware without messing with the foot switch. Doesn't look like you're able to program multiple effects to one foot switch either like you can on the 500, so if you want to create a lead tone with both drive and delay you either have to tap multiple foot switches or create a new tone. Unfortunately though when you switch tones there's a signal interruption. I'm not a line 6 hater, but this one falls short of what I was hoping for so far.