It sounds great, but its got me concerned. I hope this doesn't turn out to be a financial drain.
I've seen similar situations with rail parts vendors in the past. They will supply the components for free, but replacement parts and repair costs are outrageous!!!
Miami's Metrorail had one married pair updated with a new braking system for free in 1984. Westinghouse (Wabco) rewired the cars for the new computers, installed the computers, and tested the cars for free. Hoping Miami would revamp the cars, the cost was $25,000 per pair. Unfortunately, Miami has on local transit tax and could not afford the retrofit. Now, they are stuck with a set of cars, which have no spare parts for future malfunctions. Everytime it breaks, the cars are down while the circuit boards are sent out for repair.