The plugin looks promising and it is a much needed feature for this ecological world we want to make.
However the fact that in order to propose the Rides on the front end you need to install 2 additional plugins to manage form submissions breaks the greatness of the idea.
It requires the Gravity Forms plugin which is 39$ and as for the other plugin needed the link is broken.
I suppose the author is using the affiliate program of gravity F to earn money from the plugin.
however i don't see why I need to pay 40 $ to someone else for just a form, especially considering that the plugin author only gets 20% of it. I would however more than happily pay him twice what he gets from Gravity to have a stand alone product.
If you already have a license for Gravity forms then this plugin might be for you... however in this case the author gets 0%.
Something to think of...