This is a good deal for what I would describe as an "up market" hands free kit for your car or office desk.
Its advantages are:
1 It has an FM transmitter in order to feed audio from incoming calls or music from your handset through your car speakers.
2. It has twin mics and onboard DSP processing to help it cut down on background noise.
3. the device can be paired with two phones at the same time - or any 2 Bluetooth enabled devices.
I think its cheap because the replacement Cruiser 2 is now available. However the new one doesn't seem to offer much more than this.
Here is a review:http://www.trustedreviews.com/Jabra-Cruiser-Bluetooth-Speakerphone_Gadget_review