I've started flying with them. I have been a longtime Foreflight user, tried Garmin Pilot for a while, went back to Foreflight for its intuitiveness. I'm now trying Pilot again to see about these SmartCharts and so far am pretty impressed. They not only make the approaches very intuitive, they let you filter out only the information for your category, and for any exceptions (AWOS not available, radar required, whatever) so you don't see a lot of irrelevant fine type, but still see everything you need.
They also have made the baseline Pilot app significantly better. One reason I am checking it out is Boeing sold Foreflight (and Jepp) to a PE company called Thoma Bravo, who have a reputation for raising prices and cutting services to customers, so.....
Not sure why Garmin would need any information from Jepp charts to do this: it is a whole new way of giving us approach guidance, after lo these many years!
David