Helix sucks.

It looks nice but in reality the special handle does not work well at all. Stowing it and using it requires some work and I do not want to fiddling with it when in traffic. The other thing that irks me is the actual bag strap on top, it's way too long to balance the bag when you're holding it. It's way off ergonomically. I bought it when it was still a Kickstarter project started by a SWA pilot. It had some early hiccups but still has quite a few issues in it's final form.