I am so disappointed at how rubbish my very expensive Rider 550 is. Linking it to my phone and helmet was stupidly hard - although I have done this now. Reception to FM radio is so bad that I don't even bother with it any more but the worst thing is the volume levels. If I have music from my phone, the navigation commands and speed cameras going they ALL want to be at different volumes. This is a good thing, right? Not when it is virtually impossible to adjust the volume when riding. How do you adjust the ear shattering speed camera command when you are riding past a camera for 2 seconds? When the phone rings the volume is, again, ear shattering. Not having separate volumes built into the software of the device with the ability to test and adjust each volume in a safe place is the most stupid thing I have ever seen. I have been riding with the speed camera function disabled because I don't want it to burst an eardrum or a speaker in my very expensive helmet. So my expensive rubbish 550 has functions turned off or not used because of pain or risk of damage to my hearing. Does that make the Rider 550 even worse value by function?