I know what real banh mi is supposed to be like. This place is a joke in that regard.
The sandwiches consist of a lot of bread, and not a lot of meat. If they evened out the ratio a bit more, it may be more palatable. The biggest knock on their sandwiches is that they aren't real banh mi. Think Panda Express in regards to real Chinese food. Lee's is an Americanized establishment that caters to a clientele, in AZ, that doesn't have much in terms of authentic Vietnmese food options.
The egg rolls they sell here have usually been sitting out for a couple of hours, I'm pretty sure that they are not in compliance with the food safety code in that regard. If you go in the morning though, you should be safe. I've purchased egg rolls at 3:00pm from here and had that rock hard on the outside and super dry on the inside experience. Whenever that happens, you know that they've been sitting out for a while.
If you're in AZ, you're stuck going to this place because there's nothing around here that's a better option for "banh mi style" sandwiches. Those not from around here will recognize immediately that what they are selling is not banh mi.
Go in with adjusted expectations and you will enjoy it more.