Thanks Shane, I'll try and remember to check the signal strength the next time I see this. However, whenever I've checked signal strength it is showing all the bars lit - I just didn't verify this on the last leg of my flight. The unit is mounted with a ram mount on the glare shield of an RV-9A, so it has an unobstructed view of the sky. FWIW, I can usually get a decent signal anywhere but in my hanger. Even at home, inside the house, if I'm close to a window I'll get a good or better signal.
I've got to say, the iFly GPS has been one of my best aviation purchases to date.