There is plenty of seating, and lots of charge stations. Oddly, there are slot machines everywhere you turn - even at the car rental area! I suppose you just can't gamble enough! That's Vegas!
My greatest issue with the airport, which may be a greater issue with all of Las Vegas, is what is with the lack of signs? Signs pointing where the car rental return area are few, and the turn for the actual location of the rentals off Gelespie is completely non-existent. The lack of signage continues within the airport -- where are the bathrooms?!
Otherwise, this airport is not bad, and despite being busy, everything seems to move along.