We do not currently recommend the Remote Database Version for new users, because it is much slower than other versions.
That is because it has to communicate all data being retrieved and updated over the Internet, unlike all other versions.
We instead recommend either the cloud-based OnDemand version or the Standard version with its Cloud Storage Service, both of which are much faster than the Remote Database version.
The OnDemand version runs entirely on a server, through a small remote control application that you install, and like the Remote Database version allows for multiple simultaneous users.
The Standard version's Cloud Storage Service also allows fast and safe sharing of a database over the Internet, with editing of data allowed by one user at a time. (It is also cheaper.)