I live in a very cold climate, Alaska, and I don’t always notice when the clip lets go of the pump and the pump dangles at my leg. Needless to say, sub zero temps aren’t very good for insulin. Not sure how the pump handles sub zero temps, but it seems to be alright so far.
As for the newer clip, it holds onto the clip via a small plastic bump. That bump quickly wears down and rounds off, making it ineffective. I called Tandem and received a similar response, although they didn’t refund my money or offer me anything. In short, my only viable solution is to put it in my pocket, which isn’t an ideal solution either. Very disappointed in Tandem with their case. As much as the pump costs, they should do better.