I'd never been until today because I work in west Glendale but I had the day off so I thought I'd take the opportunity. It seems such a popular thing that I figured it would be worth it. Ha!
The parking is weird - it's all paid but not really regulated so I'm sure we weren't the only ones that "didn't notice" the parking signs. It's also basically in a big parking lot so there was very little shade when you're in line or if you're not lucky enough to snag a chair.
There was a radio station sitting right in the centre of the trucks loudly playing R&B music which I could definitely have done without. I couldn't hear my mom sitting two feet away from me. The entire space was over-crowded and not very organized. Overall, not the best experience.
A few of the trucks had way longer lines than the others which I thought was weird. Why would you wait in a 30 minute long line for a hot dog when you can just get something else right away? Luncha Libre and Short Leash definitely seemed the most popular, but I went with Emerson Fry Bread (which had NO LINE) because I'm not much for queuing in the hot sun just for food (which I reviewed separately).
We were lucky enough to be able to find two chairs but it's not a sure thing. A lot of people went without.
I do not get the food truck craze. It's mostly not worth it. Go to a nice air conditioned restaurant downtown instead that's just as locally sourced. There are plenty of them.