I don't really use GPS on my tablet, unless I'm sitting in a building with WiFi. So I don't really care, because I will also have my phone and a PC available 90% of the time (and always a phone). Times when I really need to know e.g. what frakking road I'm on, I use my phone. I'd consider a tablet if it had HSPA+ and my car came with the mount ^_^. But in simple reality, when I'm really in need of decent GPS = a 10" tablet is to big!
I have however, applied for the kit. Mainly because I'd like it just in case, and if I ever sell my tablet to someone who cares about GPS capability. Honestly I care much more that ASUS is doing this - I'm happy to be an ASUS customer again, not that I've ever really been unhappy to be.
My past handsets (A)GPS would generally go to seed the moment I got to far away from Atlanta, and e.g. be totally useless once crossing the boarder into Tennessee. Yet last road trip I took: my old TF101...freaking thing hadn't been hooked up to WiFi since leaving Duluth, GA, and was able to peg me within 10-20m of the bed room I was staying in. Friends place had a wireless router that wasn't hooked up. My phone? Bloody useless with data+wifi+gps on and still driving up I-75. Using a cell phone for a GPS device is handy but ahem, if it's important: I know what I'm doing before I get there, and rely on GPS as a precautionary check that I didn't take a wrong turn.