MGM Grand to start using "All-in/Call" cards. . .

[EWillers]

Playin' at the M tonight (Vegas. . .with the bigass lion)and a dealer mentioned that starting 4 Septembre the poker room would start using "All-in/Call" cards.

The way it works is pretty simple; a player goes "all in" and the dealer slaps down a card (presumably housed in the well) that says "all in" in front of that player. If another player calls the all in, the dealer slaps down another card that says "call" in front of that player (the cards are double sided. . .one "all in", one "call".

I've considered this system for a few hours now. I had never heard of such a thing prior to tonight.

Anybody have any experience with this?

What are ya'lls thoughts pros and cons on such a system?