A month ago I purchased the Helix floor model and this thing is unbelievable compared to my Pro X HD. I have been hooked with Line 6 since the first red kidney shaped POD came out. I don't have experience with other modelers so my opinion is biased. However, the Helix has delivered simplicity, awesome tone and solved a lot of problems I had with modelers.
1. Endless hours of tweaking
2. Create my favorite band tones quickly
4. Rich tones and modulation type affects
5. Guitar response
6. IR's. (I did not know I was missing until introduced with the Helix)
I find myself playing guitar 90% of the time instead of 10% compared to the previous modeler. Sound characteristics change as expected with different guitars such as a Strat, Gretche, 335 and my fender bass VI. I play music as a hobby and the Helix has sparked my interest again, so much so that the wife is starting to complain on the amount of time I spend in my studio! How 's that Line 6 for customer satisfaction. You can put that on your website, "You will love the Helix so much that it's guaranteed to lollipop off your wire or girlfriend or your money back" LOL.