I have a Helix, a Kemper and the Axe FX II. 
	They all do different jobs to varying degrees of success. 
	The Helix is a great device when I have no time to set up and just need to plug in and go. 
	I resisted it for a long time (although I was an early adopter of the Native plugin) but it is an excellent device. 
	The Kemper I mostly use for profiling amps- its modelling sounds better than anything else I have. 
	The Axe FX II I use in the studio- I've owned it the longest and it does some things that I cannot do with other boxes.
 
	I gigged the Helix last night, direct into the PA and it sounded fine. 
	I still prefer tube amps, if the gig allows it.