Am in the UK. I just got a Bluetooth phone and need a Bluetooth dongle.

Are all modern Bluetooth dongles effectively the same?

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I started to Google Bluetooth and saw lots of really tech stuff. For
example the Wikipedia talked about "Bluetooth profile" referring to A2DP
stereo files etc. It's too much!

I just want to make a decent connection beyween my PC and my phone!
Later I probably want to connect other Bluetooth devices.

What shortcomings are there with an own-brand Bluetooth dongle from
Tesco for about £10 or £15?

If that type is crap then what Bluetooth dongle would you recommend?