Dokku, Flynn, Deis Workflow, Datacol, nanobox.

Does anyone have experience with one of these? Do you recommend any?

I have been amazed by Heroku concept, however, Heroku prices seem to be a bit pricey. I have a production app to be produced in the following weeks, and I was thinking about getting a Public Cloud machine from OVH with one of the tools above.

Any suggestions?