We were looking for a quick game that we could play on game nights between longer sessions.  This fits in just perfectly.  The game has very simple rules (the lowest score wins), and it is player ended (first person that believes they have the lowest score, says "Rat a tat cat" and brings the game to it's final round).  It goes by quick.  A game can last anywhere from 60 seconds to a couple of minutes, especially once you get the rules down, cards are flying.  Everyone seems to enjoy it too, all age groups, and the strategy and counting aspect is simple enough that my 5 year old can play without assistance, and often beats the adults!