Just yesterday I received the DCS Explorer Wifi receiver that I bought on ebay. Connected it to the track and to my Z1000, plugged it in, went on my phone, found it on my home server and connected, went to ap store and downloaded MTH ap, connected, added my loco which it immediately recognized, and Ran My Train. 20 minutes tops! Had some fun playing and getting use to running with my phone, but considering my iPhone is never more than 2 feet from me 24/7 it was a piece of cake. I'm hooked. Can't wait to buy a second PS2 or 3 equipped loco to run at the same time. I shut it off a few times and reengaged the ap, and I love the one touch Run My Trains button. Doesn't get much more simple, and I honestly don't have time for fuss.
One other thought... I've read a lot over the years about getting youth more engaged in the hobby. Skies the limit when you start integrating trains with phone driven aps. Makes it easy for kids who know there way around a smart phone. Also... i envision a day when I look down at my phone which is running my train, and it will give me a drivers view from the cab of my locomotive via built in camera's. We are just scratching the surface with technology and trains.
That's my two cents. I have no doubt that Lionel's system is easy as well, it just came down for me what horse I chose to ride. Started with a MTH RTR set, and so that's the horse I'll ride.