It's not a Helix, but there's two primary advantages. First, it doesn't cost the best part of $3k. Second, you can buy this and not become one of those 'Helix People', showing up at every reasonable discussion about guitar amps or pedals etc yelling at everyone about how good modelling these days is. As Mazda says, Zoom zoom.

Model: Zoom G5N
Made: China, recent model (serial B76012715)
Type: multiFX/modelling
Power: standard 9v negative supply, not included
Switching: true bypass
Equivalent new street price (approx): $599aud
Mods: none
Accessories: original box, no power
Condition notes: used, no major marks, fully functional. Overall: excellent condition