for your car or a rental? I’ve never done that for a rental.
Personal car, yes. REALLY easy.
Plus now the GA Peach Pass works as a Sun Pass in FL, so I now have toll reciprocity with FL, just like CCW.
Personal car, but it would be cheaper than paying the rental rates around Miami or Orlando, even factoring in the cost of the tag purchase and setup. Just remember to deactivate it and scrape it off when you are through.
In Texas, there are 3 or 4 different toll road providers, but 3 of them have interchange agreements. Some tags interchange with Oklahoma, some don’t. And some of the airport lots link.