Our 9A (bought flying) has the Odyssey, and I generally like it. It has a bit of a learning curve as far as programming, but it is quite flexible. There's also an MGL forum where you can post and get assistance. I have a Mac computer, so I installed a Windows operating system in a virtual machine so I could run the MGL software.
One of many nice features is the SD card which logs all your flight data, from CHTs to altitude and everything else. After landing, you can pop out the SD card, bring it to your PC, and export all the data in various formats. You can also output a Google Earth track of your flight.
Our Odyssey isn't the newest revision, so its backlight in night mode isn't as dim as the newer model offers, but I fly day VFR anyhow.
Our heading indicator runs off of an older version MGL sensor and is essentially a compass - turns to headings take some getting used to, much like turns using the standard compass.