We had a late lunch at the Hyatt office building outpost of Small Cheval last Thursday following the CAC cruise and a long riverwalk (not a Hyatt hotel, the nattily suited security guy at what looked like a hotel lobby desk pointed out, even though "everybody asks that.")
Our order: single cheeseburger, fries, cheese bun, sodas. While I didn't think it was an astoundingly great burger, it ranks up there. Same for the fries: Ms. R said they are what McDonalds fries used to be when McDonalds fries were still great. That's actually a pretty high bar for plain shoestring fries. The cheese bun is just a cheeseburger sans burger, a pretty good treat for the price as both bun and cheese are above the ordinary. Worth noting especially for the area: Sodas are fill-your-own. Very nice location and view, too, on the west side of the main branch across from Beatnik.