Bluetooth is much like USB. It works well if implemented well, and works hair-tairingly poorly if implemented badly.

Windows has been the common denominator in the worst Bluetooth experiences I've had overall, most likely due to Microsoft not getting around to supporting an industry standard until well after all the third parties added it to the OS for them.

Oddly, Apple is going backwards with Bluetooth support. In 2002, I could sync my T68i via bluetooth, and respond to SMS messages on my computer. In 2007, I bought an iPhone that couldn't do either, and now OS X even won't let me respond to SMS messages when the phone is capable of it.