The geometry is pretty accurate-looking; however, a lot of parts don't seem proportioned quite right, at least for a Sauerbraten-sized character. For example, at the sniper's nest looking down into the underpass, one can barely see over the top of the wall, whereas in CS it is barely up to the knees. Some crates also seem oversized. The main entry hallway seems a bit wider than I remember, while the long hall to the left (coming in) is skinnier than it should be.
A lot of this is probably just due to the Sauerbraten character being a different size and shape than a traditional CS-style human, so take it all with a grain of salt...
Also, just a bit of opinion from me here: Building clones of existing maps from other games is good practice (and practice is important for building any skill), but it is selling yourself short if you only do clones, especially if you get lost in trying to make a clone "just so" to match the original instead of spending some time experimenting with original ideas.
Anyway, keep up the editing! :)