We've used the solution about 100 times across a number of different projects. We're currently using the 2014 and 2017 versions of the solution with an on-premises deployment model. 

We're partners with Microsoft.

I'd recommend the solution for those looking for something to assist with their development process.

I'd rate the solution nine out of ten.

I rate LocalDB a ten out of ten.

I give the solution a seven out of ten.

We have 100 users.

We require two people for maintenance.

I recommend the solution to others.

The only caveat is to pay attention to the user context. The SQL engine doesn't run with a privileged or system account, so it really has only the permissions of the currently logged in user (files, network, etc.). It is advisable to install the SQL Server management studio (also free) to administer and configure it

We use the on-premises deployment model.

I would rate the solution nine out of ten.