Does anyone have experience with the Reliance TCA1003D transefer switch?

I've looked for details, and can't seem to find any. It it really a 100A/30A breaker in a box - mechanically interlocked? So in operation it becomes a "whole house feed", and the homeowner has to figure out what he can and cannot use.

Also, this means I've got to get the PoCo involved to install it (kill the feed), right?

Thanks for info!