Boston Area Network

Hey everyone. Looking to get some info on if anyone in/around Boston is still actively using the GTM. I live on the north shore, wife works in the city. I’m looking at this product for a shtf scenario when she’s in the city and I need to go in and get her. I’ve noticed on the map that there are some in use and even some permanent relays posted but also know the map can’t be reliable. Looking to get as much info as possible and hopefully an understanding on how well the system works in the Boston area. Stay safe.