I'm riding a Cowboy right now, and I chose it because they didn't have the service and quality issues that Vanmoof had. I've been very happy with it and hope they will not go under. I was annoyed with the app but I created a bluetooth key fob so I don't have to use the app to unlock it. Now I'm even happier with my daily rides.

That being said: if I were in the market today I think I'd go for the Veloretti Ace. Less proprietary parts, great design and owned by a stable company.