It’s very convenient to leave your car. We use the self-park option. The shuttle usually comes promptly, both for departures and arrivals. I find the cost to be comparable to Uber/Lyft. We live an hour from the airport. I like getting into my own car. Checking in and out is easy with the app.
Ease of reservation, ease of check-in, ease of checkout and drivers were very helpful and friendly to all passengers, even some that didn't deserve it.