I tried the Naaco Truck during lunch time downtown. We went around the middle of lunchtime (12:30ish) and by then, most of their Naacos and Samosas were sold out. Nevertheless, I was super excited to try the Naaco after reading their website online so I ordered the chickpea one. It took around 15 -20 minutes for me to get my food which is pretty long considering 3 people behind me got their's first. As for the Naaco itself, it was good but not the best (chickpea patty or naan) I've ever had. I really liked the apple chutney though, I think that was the best part of the Naaco. I would try it again but maybe next time they'll have butter chicken (and if it's better, I'll improve my rating =D)! I've also heard great things about their S'morsa (S'more + Samosa) which I am definitely down to try!
One other thing that the Naaco Truck is really good at is their marketing. They are really colourful, creative and animated. All other food trucks pale in comparison. Whomever did their graphic design stuff is really good!