Considering it is the only drive-in theater anywhere near Las Vegas, you have to enjoy what you get or don't go at all. For those times when you want to bring the whole family out to a movie, you really can't beat what WestWind Drive-In Las Vegas 5 has to offer.
Located just north of Fiesta Rancho and right next to the NLV Airport (expect a plane or two to land or take off while you're at the movie), it does suffer a little because of the neon signs. While watching "Kung-Fu Panda" tonight, many of the dark scenes were quite difficult to see. Other than that, you can see the screen's just fine. The audio quality is based on an FM station that you tune into in your car. My radio always has some scratchiness to it (I've also heard it in other cars), but more often than not you can hear the movie from the other cars around you without much strain.
The cost is $6.25 per adult, $1.00 for each child over 5 and Free for those under 5. On Tuesday's the cost is $4.50. Each show is a double-feature, so in our case tonight we had KFP and IronMan. Concessions offer anything you want but just bring in all the food you desire in your trunk and enjoy a picnic on or around your car while you wait for the movie to start.
It opens up an hour before the earliest showtime (usually shows start at dusk around 7 or 8 depending on time of the year); I'd recommend showing up 30-45 minutes early to get a good spot so you have room to relax. Bring chairs and blankets and make a tailgate out of the show. If I can say anything more, having all of this room to relax while watching the movie is one huge plus over a regular theater.
See you at the movies!