I don't really play CS:S so I didn't try this with bots or players, but I had a look around anyways.
The architecture and - especially - texturing work are really great. Indoors, everything feels very realistically dirty - trash on the floor, stains on the walls of varying sizes and shapes, wood splinters. The texturing choices indoors look absolutely great. Outdoors - same. Dirt, stains, streaks. Very good texturing out here as well, quite varied and realistic. I liked the architecture as well, quite detailed but not overdone.
I did notice a few things that you should keep in mind for your next map. One - I noticed two chairs outside floating almost a foot off the ground. Two - there were several places (pile of logs, wagon, hand railing) where I could jump on top of and see over the edge of the map, to a lot of nodrawed faces etc. Try to clip these areas off or raise the walls a bit next time. Three - I saw several radiators (heaters) sitting on the ground, which is rather unrealistic.. try raising them up half a foot and making them motion disabled/asleep.
Regardless of a few small visual problems that I doubt most players will even notice, the map looks great and I'd bet it plays quite well. Nice job!