Very convenient - open 24/7. Facility is clean and well stocked with various detergents for sale (the "free soap" promo must be over, but I brought my own jumbo jug anyway). Extremely friendly, helpful staff on hand to assist with questions while he washes loads for full-service customers.
Most machines are operational. Wide selection of washing machines - there is a size and price for every load, from standard-sized machines (like a large household washing machine - $1.75) up to 75-pound mega-loads ($4.75). Washing machines are fast and thorough. Only con: the dryers are cheap (25 cents for 9 minutes), but you get what you pay for. They did dry a double-thick blanket-comforter in 3 9-minute cycles, but a large load of regular clothes and towels took longer; also, left a fair amount of lint/pet hair on clothes. I guess the dryers are as efficient as a home machine, but I was just left feeling empty by their mediocrity when everything else in this place shone (LOL).
Also, don't be put off by the sketchy neighborhood - I did my laundry there at 2am and no one bothered me.
This is a good place to take care of your dirty laundry if you are visiting Vegas for a long stay, or if your washing machine craps out (as mine did this weekend.)