This is a great airport. The TSA staff are always friendly and efficient, the food selection is pretty good, it's well-kept and there are videos playing in loops about airport security starring Vegas performers like Carrot Top and the Blue Man Group.
Terminal 3 seems a little cold and heartless and half-deserted most times of day, but it's better than many other airports I've visited despite that. The only major issue is a lack of dining *before* security; Terminal 3 has a Starbucks and the main one has a Tex-Mex joint. Once inside you'll find sit-down places and the ubiquitous Sbarros and Burger Kings.
There are recharge stations but there could always be more; there's often a crowd during even somewhat-busy times. All in all, a nice place to pass through or fly into or out of; drop by one of their many slot machines of you want that Vegas gambling experience whilst there.