From the Northwest corner of Las Vegas I have been pleased with the bus service. When I have business to do downtown or want to enjoy a busy festival with limited I use the park and ride. The transit system has done a nice job providing online trip planning tools. Also our park and ride locations have indoor heated or cooled waiting areas.
If you travel between Las Vegas and Southern California at the Southwest park and ride you can even take Mega Bus to Riverside or LA for a low price with free Wifi on board.
Check out my article I wrote about Centennial Hills transit center complete with videos article bout improvements made to make using the bus easier.