That’s tricky. They don’t really give prorated refunds, so if you did the yearly price, you likely wouldn’t get a refund. But if you did the monthly price you’d only be stuck with that price for 1 month, but then they wouldn’t prepare an extension for your unused Cam Unlimited yearly toward your new plan like they would toward the CUPro yearly.
I think there needs to be an easier way to try it out with guarantees.
My friendly advice to you, as a sort of long time forum friend would be to make sure you’re first aware of what others report in their reviews. I like this one:
Also be aware that if you have HMS it will get cancelled when you add CUPro. That might be a deal-breaker for me. Then if you ever try to switch back to HMS you also can’t get your grandfathered price back.