I bought this GPS receiver for my iPad mini, as the wireless version has no built-in GPS receiver. Came a RT2100, and I'm really very happy, and also kind of surprised, because the signal is there very quickly, Navigation works fine, have the recipient butt in the car rear-view mirror mounted and a power cable laid under the roof lining through, thus permanently mounted, so I can use it either for my iPad, but also for my iPhone.
Danger: -------- Does the iPad or iPhone with a jailbreak and the app "roqyGPS" that must be purchased in Cydia for 5 euros, but is definitely worth the money when you consider what an iPad with GPS costs more. As a navigation app I use skobbler, is (almost) free, and in my opinion, as good as Navigon or TomTom.