I'm still debating whether to pull the Visible trigger or not. Deprioritization hasn't been much of a problem with either of our hotspots, even in heavily congested areas. The slow downs have nearly always still supported streaming with little or no buffering. It typically only lasts a very short time anyway, sometimes just a few minutes, unlike true "throttling" that drastically cuts the speed for the remainder of the cycle.Let me know how Visible works for you. I tried it as a beta tester and there were major issues. They may have corrected them by now.
PS- Visible is subject to the same deprioritization (congestion throttle) that Verizon prepaid is subject to, i.e. there is no "premium data" offered before congestion throttle kicks in.
If you're in an area with a lot of tourist traffic, you will get slowed down.