Pros: Well made .nav file with common places named that work with the radio commands.
Also quite satisfying to play with 7 or so bots =P.
Cons: Can't climb on top of crates at CT base becuase of clipping, the skybox over bombsite B is waaaay to low, grenades just bounce right of the sky (they shouldn't :S). Walls and rooms seem very bland no props and hardly any decals used to create an good atmosphere within the level, next time try including some barrels here and there or a breable window to make the map seem more alive.
Through the window pearing out into the courtyard (I'm gonna persume its a courtyard =P) I just saw a big purple and black block texture. Obviously you've used custom textures here but forgot to put them in with the .BSP, you should use Pakrat for this, saves a lot of time :D.
While I admire the nice archs and peices of wood sticking out of the walls you've placed around the level, I can't help think that theres to many of them, you need to add some more variety into the corridors.
I also feel I have to point out that the map is too camper friendly, having small alcoves behind crates.
The map also feels a bit to small for a DE map, yes it may be good for low amounts of players, but when more people join the fray, things become cluttered and compact. Along with this, the balancing seems to in favour of the CT's having both bombsites very close to spawn where people can rush in and set up camp very quickly.
Finally, not a major gripe but it would of been nice to see a radar =/.
Improvements: Add some props and different styles of corridor to create a more sigificant atmosphere, don't put clipping over crates and maybe try using soundscapes and volumetric light in places to create a better looking level =D
Notes: One last thing, I know a lot of people take this for granted, but I think its great you've made all of you're textures line up, I didn't find a single one out of place.
Keep mapping and never give it up ^^.
Splat.