They started taking pre-orders (maybe since a few days ago?). You don't need to put any money down right now, but if you pre-order, you'll need to make a 50% deposit and decide your choice of model on 20th January 2017 and your bike won't ship until June, although I wouldn't be surprised if it ends up being later...

I reserved one, but I think there is a fairly high chance that I'll cancel if not a single Helix has been shipped to backers or reviewers by the deposit payment date. It's a ****ing gorgeous design, so I really want them to succeed.

I've loved having the benefits of a folder since I bought my Tern Verge x10 a few years ago. The x10 has a design that is far more compromised as a result of the fold than the Helix, such as the awkward fold (easier to carry unfolded!), smaller wheels and issues with chain dropping off, which they fixed on recent models by adding a little plastic arm... It actually rides quite well though, which is why I bought it instead of a Brompton, and have done a few pretty epic rides with no issues.