Really? It blew my mind when I used it because of how good it was. I needed to create a pizza with half-and-half toppings and it was really easy to do. Maybe not all corner cases have been handled well, but given the limited UI space and just how complex ordering pizza can be (your use case to wit), I think they did a great job.
Same here, I was floored by how good it is. I'm obviously rating it on a scale of "Apps by Canadian companies" and in that scale, it's the best without question. It's not like I'm looking for the Pizza Pizza app to have a Reeder quality level.
I've reported bugs, submitted reviews, and recommended it to others. That's the benefit of doing it properly. I sure as hell haven't recommended or supported the terrible, half assed apps other Canadian retailers have on the app store.
Try ordering two of the same kind of dipping sauce or removing toppings from a pizza.
(I just had used it haha)