I ran one on my trike and on my SWB.
I did it mostly for comfort against rain and cold. For that it works great. as to speed, I am not sure there was much gain. It certainly did not slow me down, but it is hard to quantify the speed improvement.
It is my understanding that of all the bent platforms, the LWB like your EZ, is the one that benefits the most from a fairing due to the fairly upright position. Faired and socked Tour Easy/ Easy Racer are generally considered fast.
Some random observations:
* It does seem to have a positive sail effect with any tail wind, even a quartering one.
* It makes the bike bigger and harder to "park" (not an issue with the trike.
* It makes getting on the trike a bit trickier, (not an issue with the bike).
* It amplifies perceived chain noise in the cockpit. Both have idlers and chain tubes.
* You may want to put a cover on the fairing when the bike is stored/parked to keep dust and scratches away.
* I made my own mounts out of PVC pipe and aluminum, since "store bought" mounts can be pricey.
* Warning, riding a trike with a fairing makes you want to buy a velomobile.