I have heard a number of people being concerned about the future of MSWIN and the free ride that users enjoy right now might be in question for the future. The political stability at the state level for funding of MSWIN might show it's ugly head in the near future. If the state doesn't get the funding to continue at the level it has with the MSWIN system, the only other alternative is to start charging each user a fee to use the MSWIN system.
If I was an agency that was looking to jump on the MSWIN band wagon for a new radio system in the future, you might want to do some serious homework to see what the future might bring. Until the state legislation provides the MSWIN funding for the next year or two, I would walk cautiously.
Don't put all your eggs in one basket until the future is known to be solidly supported.