No soap? Yikes, what a terrible thing to tell you. Coatings aren't magic and don't make dirt suddenly not scratch paint. Do use soap when you wash. I think the dealer just wanted to make it sound more magical when they told you that.
I'm not terribly familiar with the Simoniz Glasscoat but I've had permanent paint coatings applied by a trusted detailer in my area to both my previous Evo and my Fiesta. I had OptiCoat on the Evo and splurged for 4 coats of Ceramic Pro 9H and a top coat of Ceramic Pro Light on the Fiesta. In both cases the recommendation was the same: frequent washes (with soap) using microfiber only and/or touchless carwashes. BTW touchless carwashes are terrible for wax as they have strong detergents that can strip it, but coatings are unaffected since they have to be polished off. With both of those products, yearly inspections/details were required to keep the warranty active and the car looking polished since they do still get some of the wear and tear that your clearcoat would normally receive.
From searching around a bit, it doesn't sound like the Simoniz is quite as durable and I see some folks saying it was breaking down after less than a year and not performing as well, although that was only a few folks. Personally I would either take it back to the dealer to yell and scream for warranty re-application whenever it appears to be losing its hydrophobic effect or simply care for your car is you normally would with regular waxes and whatnot and just enjoy that it probably gave you a little more protection. Wax won't hurt it, it just won't really offer your paint any more protection if your coating is working correctly. I'd imagine Simoniz offers a lifetime warranty without required inspections since the stuff is pitched through dealers to average folks who are not terribly discerning about their car finish and generally will get rid of their car long before paint problems would appear anyways. The product is also inexpensive and not labor intensive, you mostly just paid for the warranty.
