Can you let me know how you felt about the Motorola Bluetooth FM Modulators?

I want to use my phone with my SiriusXM app. My XM radio is shot and I'm currently trying to listen to my talk shows through the phone in the car on my DX. I know that people say that FM Modulators have horrible sound. But my XM radio with car modulator was not bad at all, no static and could get very loud. I have no cassette deck nor bluetooth radio.

I'm looking at:

Amazon.com: Jabra Cruiser Bluetooth Car Kit, Speakerphone [Retail Packaging]: Cell Phones & Accessories

Amazon.com: Motorola T505 Bluetooth Portable In-Car Speakerphone: Cell Phones & Accessories

So please let me know what you gurus think?

thanks!