If you want to save some dollars ( about $1500 difference) and have better collison avoidance try the Zaon -PCAS XRX and dont waste $ on the TIS add on from Garmin. I had the Garmin TIS add on in my S2 and it only works when near a major airport with radar, and mostly does not work in most of the areas we fly these Cubs as you must recieve a radar retruns for TIS to work. That said the PCAS unit from Zaon is half the price and works on all three broadcasts ( TIS, aircraft Transponders and TCAS) and thus works much much better. I have it in my Carbon Cub now and it can be displayed onyour 496 or 696 also. Best Gary
http://www.zaon.aero/content/view/12/40/