My problems with the Pro-Clip are:
1. For my model of car, it puts it right in front of my heater vents and is awkwardly placed almost behind my steering wheel. I don't feel comfortable having any kind of device in the direct line of heat, as my heater gets very hot. The phone already gets hot enough charging and running the GPS. I guess it would be good in the summer though when the a/c is running.
2. The "base" looks like nothing more than a 50 cent piece of metal bent to slide in between my console bezel and dash, yet they charge almost $30 for it. The holder I could see costing a bit, but again, they want $35 just for that. Throw in a charger and they up it by another $20. What really makes no sense is the "hard wired" version is another $20 on top of that and it has no plug at all, just bare wire.
So now we're talking almost $85-$100 if I want a mount that charges my phone, that also puts it in an awkward place. Or I could go with the OEM dock that sticks to my window, or dash, or a friction pad for $20. At least if it does suck I'm not out much and could probably make most of it back from Craigslist. I personally haven't really seen too many complaints about the Moto dock, not saying there aren't any, but not enough to dissuade me at all. I've had decent luck with most suction mounts lately.. my TomTom has never once fallen off the window.
I guess ProClips are for people who just have money to burn.