I've had the 296 and now the 496 in my RV6. Both are great and I am really at ease with their functions. The unit also drives my autopilot perfectly.
My only little gripe is on the 496 you get all the airways displayed, which can really clutter the map to a point that it becomes unreadable. Quite often these are airways above a TMA and to make it worse if you move the cursor to highlight a TMA it will default to show the altitude of the higher airway which can lead you into thinking you have more height available. It would be nice to have a disable airways button in the software.