Added value comes from the knowledge, the experience and also from the innovation. The driver for innovation is experimentation. Years in business, dozens of stations built, large projects, owning stations and using them as a live research lab will allow your vendor to bring real innovative solutions and add value to your project.
A CNG station will last for many years when built correctly, but it will outlast all other options when built with the right selection of equipment. Your vendor's ability to manufacture a portion of the equipment needed for a long-lasting station within a reasonable budget will be a key factor in the succesful execution of your project. Beyond the cost savings, you will find that the integration of the element working as a whole deliver a much higher performance and greater ease of use than trying to assemble a puzzle made of many parts from many different manufacturers.