Hi all, we have a Garmin GPS here in the US. Garmin sells a chip/SD card that supposedly works in the DR. We go to SD 1-2 times a year and never need directions but when we go next month we want to drive places we've not gone to in 20+ years (east and north) and with the new roads, etc., it might make things easier. My gut says the chip is a waste of $$, so I'm wondering if anyone has used a GPS there and if it's a waste of time/money or worth it?