I use the LAS site about 6 times a year.
I find one of the best airports in the country for The EC, since the bus and check in counter is often jammed packed on most weekends, but as EA you get dropped off first just as they enter the property.
Emerald Executive has better cars like the new Buicks, SUVs etc
Emerald Aisle you most likely end up with a Grand AM, Alero or Impala ( or worse)

mike