My gripe with it was that I couldn't get Nokia PC Suite working with the BlueSoleil stack ... mainly because Nokia's software only supports 4 stacks:
• Digianswer Bluetooth Software Suite
• Microsoft Windows XP Bluetooth
• WIDCOMM Bluetooth for Windows (BTW 1.4.x, BTW 3.x.x.x)
• Toshiba Bluetooth Stack for Windows XP/2000
So, I set out to install the Widcomm stack and hope that it would run with my ES-509.
Now, I did my research and found a few forums (this one included), and came across this thread on another forum:
thread on mp3car.com
Although my dongle wasn't on the list of devices tried and tested, I decided to give it a go.
I followed the instructions word for word ... ESPECIALLY all the preparation parts ... uninstalled IVT BlueSoleil, downloaded ALL relevant files beforehand, rebooted, disabled anti-virus and firewall etc. (+ pulled my network cable out), installed everything ... and guess what? It worked first time and has done ever since.
Hopefully this helps some of the other ES-509 purchasers out there ... and remember to follow the instructions word for word.
USB Bluetooth dongle; Prodigy ES-509
Windows 2000 Pro., with Nokia PC suite 6.5.10
Nokia 6230, firmware - no idea sorry