Pros: Has some nice ideas, and is a good for a first try at a zombie map? Definetely better than the first few versions :D Fps is decent, no lag
Cons: The spots are very similar, I understand that it is hard to come up with new spots, however I think having so many similar spots with just cading is a bit much :/ Some are very hard to get to as zombies, spots should be balanced some should be easy some hard and some mediocre to beat (this creates a nice balanced map) Shadows are all bugged on the ceiling? Something to do with your lighting? This can be fixed by in each props menu finding and disabling the shadow "disable shadow" when you double click a prop.
Improvements: Try to come up with some newer different spots, and look at other things I mentioned, oh and next time you add a map make sure you isable your net graph and hide your hud by using sv_cheats 1 then cl_drawhud 0 and then impulse 200 to disable your gun view. To reenable your hud type in cl_drawhud 1 and type in impulse 200 again to see your gun. Also don't make all the walls so thin ^^ This can be a pain for zombie mod as it doesn't look correct.
Notes: Keep it up, I don't think this is the final it could do with just a bit of editing then it could be much better!!!
At the moment its a good map for your first, but it needs some improvements as I said. (this isn't supposed to demoralize you) this is supposed to be decent feedback so you can look into what you can improve! Not I had several peoples opinions on my feedback and they agree, but it could be an awesome map so good luck :D