I finally got around to visiting Saigon Diamond today. They've been open for just a month, and I've driven past several times on my way to and from other businesses on John R. The Yelp reviews ranged from so-so to bad, but I thought I'd best see for myself.
I ordered a pretty standard bowl of Pho, with beef brisket, tripe, and the usual mix of mystery bits, and it was very yummy, although not as aromatic as some I've had. I added a bit of Siracha and the accompanying herbs and vegetables.
This is a pleasant place to dine, more so than many other restaurants in the area. It's has an open feeling, it's very clean, and the staff is friendly and attentive. The menu is extensive and contains a number of dishes I haven't seen at other Vietnamese restaurants. I'll be back.