If you are still wondering about this, I have the MW600 and it works great with the Radar. I really hate the stock headphones that come with it though. I use aftermarket headphones with mine. Any standard headphones work, though you'll have to deal with the extra long wire.
The only issues I have had is that some apps don't output to stereo bluetooth well and the sound will momentarily cut out. This especially happens with music streaming apps. WPRadioNet works good for me though.