I'm published with them. Book 3 in my series comes out in Feb. -- currently contracted for 2 more books in that series.
They do pay advances, which is rare for a mid-list pub. at this point, esp. those that focus on mysteries/thrillers.
My editor is great, and they do pay out their advances and royalties as they say they will. Which is also (sadly) becoming more and more rare in this biz.
As for a time frame for repsonses, I'm not sure. I'm agented, and my first series was picked up fast (one week after my agent pitched!) Subsequent deals (additional books, any new series, etc. have taken a little longer, but that's a different sort of thing than pitching a first book).