For such a busy ariport McCarren still manages to be user friendly.  Unlike placs like SFO or LAX McCarren isnt confusing and pretty straightfoward as fas as airports go.  There are lots of places to shop and eat not to mention all the slot machines including the iconic Wheel of Fortune LOL.  Depending on where your gate is located you may have to walk quite a bit, but given my fondness for eating I really dont mind :)