Mine pairs flawlessly with my Samsung noise cancelling hedphone, with my nokia HT905 headphones , nokia ht 905 headphones, with nokia ht-904 hedset, plantronics pro headset, LG headset, Supertooth BT- speakers/sub, my Samsung netbook and sony vaio laptop, my saab 93 cabrio, and my wife's VW Touran.
As you may have guessed BT is as essential as oxygen to me and the Desire never failed me yet in the 6 days I have had it, nor did my old Hero in the preceding 6 months.
My other phone, an Htc HD2, sometimes fails to auto connect when I get in the car, but the Desire never missed a beat (yet)