I just started the free trial and it seems to be a very promising implementation - certainly not trivial to get something usable like this. My problem is the pricing model. The only option is $29 per month for unlimited users, etc. That's too much for someone like me who just "dabbles" in Bootstrap websites (non commercial). I would happily a smaller single user free, but could not justify that much for something I would use on an ad hoc basis.