Signal acquisition is excellent, the unit is small, easy to use (on or off) and has impressive battery life. On the first day we used the BT-308 we accidentally left the receiver on after doing a 40 minute software test . Six hours later we 'discovered' that the power had been left on so we just connected again and kept on testing. Line of sight range is about 25 feet, and this was achieved by carefully holding our testing PDA so as not to block reception. While doing this test we discovered that how the PDA is held can affect the quality of the Bluetooth connection. In fact, even when the PDA and GPS are just a couple of feet apart, placing a thumb over some areas of the PDA would result in a complete loss of connection.
Anytime the Bluetooth connection was interupted the Bluetooth Connection Manager would pop up. We found this to be a nuisance and feel that the Connection Manager should make an effort to reconnect on its own. This behavior may vary from PDA to PDA. We also experienced a number of known Bluetooth bugs with our iPAQ. When the power is turned off with an active Bluetooth connection the PDA locks up and must be reset. Check with your manufacturer for a ROM update if you're having Bluetooth problems. Overall we were pleased with the BT-308 as a GPS receiver -- quick fix times and tracking of 9 or 10 satellites were typical. We were less impressed with the Bluetooth experience (not the fault of GlobalSat) and continue to favor hardware-to-hardware PDA/GPS solutions. While having a wireless GPS is cool, having a rock solid no-hassle CompactFlash GPS is way cool.
