I've been pretty satisfied with the Ion Speed Pro for the past year. It's better suited as an action cam rather than the traffic documentation cam I really need. The ultra-wide lens doesn't record fine detail in license plates reliably. But for only $50-$60 it's good. It's been rainproof as-is, no need for protective housing.

Main limitation is the 90 minute run time per charge. On dry days I can plug in an external USB battery for continuous running. But this compromises the weather resistance -- it's necessary to remove the rear cap that shields the USB and HDMI ports, etc. And it's a kludge. Usually I need to strap a small pouch across the handlebar to hold the battery and snake a USB cord to the camera.

A relatively cost effective solution would be to buy another Ion Speed Pro and just swap out cameras, then recharge one in a dry bag while the other is running.