I'm even thinking of getting to make my 3G iPad1 better through heated windshields).
Yeah, I can confirm that. The DUAL GPS is the ONLY ONE (and trust me, I've tried every gadget in my drawer), that I've been able to get to acquire a GPS fix behind the heated windshields of the triple seven. It works like an absolute charm, quick lock-on, seamless tracking at M 0.85, is easy to set up and has excellent battery life! A very worthwhile addition to the GPS equipped iPad 3G. Highly recommended!