Does Metlife's Coverage A Plus home insurance really work?

I got a home insurance quote from Metlife that seems too good to be true. They are the cheapest and claim they will pay out actual replacement cost, even if that cost exceeds my policy limits. The dwelling coverage offered is half of what others offer, but the agent says I shouldn't worry since 'Coverage A Plus' effectively has no limits. This is unique in the market as far as I can tell. Does anyone have experience if they indeed come through on this commitment?