The beef sate subs at the Chinatown location... You have to deal with a.) the lard/butter that gets SLATHERED on there, b.) the processed cheese slice that spans the entire sandwich, c.) all the grease dripping from the sate beef, and d.) all the sodium that goes into everything plus the sauce that is added on. So yeah, I would have to say that they are quite unhealthy. But who gives a fuck. It can't be any worse than a Big Mac combo.
As for the MSG argument, this is what I have to say. Western societies and "studies" are so quick to demonize and yet, a.) it was invented by the Japanese about half a century ago (something like that), b.) they consume this shit like CRAZY -- it's in EVERYTHING they eat, and c.) they are one of the longest living populations on Earth. Fast food diets will kill you before an MSG diet.
And just to add my 2 cents.. I don't think every viet place uses MSG. MSG leaves a very distinct feeling of thirst in my mouth and dryness/tingly feeling on my tongue. That's how I can usually tell how much MSG they've put in. The worst offender is probably Pho 88 (but sofaking good), middle offender is pho thanh (also sofaking good), and seemingly the least offender is this pho place owned by a beyonder's parents that's right across from the Foothills Hospital (now I forget what the name is). Something pho and grill... Anyway, at least that's what I think. I could be completely wrong.
MSG by itself does nothing. It just tastes salty and leaves you thirsty. But added to an existing broth can really accentuate the flavour and bring out it's "sweetness".
You have a couple of photos that are great... you must be very good at photoshop!