If you have adopted a shelter dog, where did you find it and what was your experience?

Just beginning to think again about the idea of getting a dog. It is problematic for me because I live alone and travel a fair bit. If you have adopted from either a rescue group, an SPCA or petfinder.com, I would like to hear your evaluation. I would like to find an adult, well-adjusted dog if I do adopt. Like small and furry but not fussed as to breed or mutt. Is that likely? Did you find the written descriptions to be accurate? (Tempted to add “Animal Lovers only” but I assume that is a given. :-P)