I’ve used several simulators and I am familiar with and use a variety of systems similar to the Avidyne 540. I purchased an airplane with the 540 already installed and after giving it a try and attempting this simulator I’m just going to yank it out and get a functional GPS. Don’t get me wrong I think the 540 has promise, but avidyne needs to figure out how to make it easy to learn and get started on. The simulator data base issue where you need to have a jeppsen account just to use the simulator and the demo data base doesn’t work is just designed for frustration. Same problem with the actual unit. I really think it could be an easy to use unit, provided you can get started with it. The folks at avidyne just have to many useless hurdles with unnecessary complications. I’ve already been to two avionics shops, and the unit just needs updates that are difficult to install, require repeated calls to tech support, and take way to much time, just like the simulator. Other systems are plug and play compared to these and I strongly suggest looking at other systems.