My thoughts are that it would really depend on how you charge. Remember, this is going to be J-1772 charging and it will take 4-5 for a full charge.
If you mostly charge at home, $60 on their chargers may be a lot more than you ever would spend.
If you don't have the time to site around to charge at J-1772, then it may not be useful.
f you are near a Supercharger, then it may not be as advantageous.
In my 88 mile 2015 Leaf, I rarely charged away from home. Dependent on where I was, it was different companies that I charged on, (ChargePoint, EVGO, Georgia Power, Blink, etc) because they were the convenient one. But even then, I'm not sure if I ever used a public J-1772 connector, these were most DC Fast Chargers (equivalent to superchargers)
But if there is a plug near work and you don't have charging at home, this would probably be an awesome solution