What I like about it is the fact they actually momentarily shut down during a bad spike.
Surges are done in microseconds. A shutdown takes milliseconds. Hundreds of consecutive surges could pass through that Monster before it even thought about shutting down. You have assumed features that the Monster does not do.
Same applies to a UPS. Read its specification numbers. Destructive surges can be hundreds of thousands of joules. How many joules does that UPS claim to absorb? Hundreds? How many joules does the Monster claim to absorb? Near zero.
Yes, they can claim surge protection because it does something above zero. But is near zero protection really protection?
Generally a surge does damage. Or is made irrelevant by protection inside appliances. A PSU will often consume a smaller surge as electricity to power electronics. Convert it to stable DC. Then convert that (and AC mains electricity) into over 300 volt radio wave spikes. Those spikes are converted to rock solid and state DC voltages (ie 3.3, 12 volts). Where is better protection? Power supplies routinely create high voltage spikes. Then convert them into best DC voltages for electronics. Best protection is already inside. What does the Monster, et al do?
Read its specifications. It only claims to protect from a type of surge that typically does not do damage. It does not claim to protect from a type of surge that would blow through the '300+ volt spike to low voltage DC' converter.
Monster specs define a protector circuit similar to what sells in big box stores for $10. Monster adds an expensive case, switched outlets, USB power, and a volt meter that reports nothing useful. It claims protection just like a power strip. Its specifications claim no line conditioning. Monster simply implies these functions in advertising - where spin and lying is legal. They cannot lie in numeric specifications.
It sacrificed to save some appliance? To avert a house fire, an undersized protector must disconnect protector parts as fast as possible. And leave a surge connected to appliances. Since protection inside appliances is more robust, the appliance remains unharmed. By grossly undersizing, a failed protector promotes sales. It fails on a surge too tiny to damage nearby appliances. Best protection was already inside appliances.
If its thermal fuse does not disconnect fast enough, then a fire may happen. APC (under new ownership) admitted last October that many of their protectors are also dangerous. Those protectors must be removed immediately. That reality should concern you.
A completely different device is necessary to protect appliances. And to avert plug-in protector created fires. Unfortunately this well proven solution is also called a surge protector. Meaning most consumers do not know of this effective and tens of times less expensive solution.
Realities found in its numeric specs (that contradict advertising claims) should concern you - seriously.