Well First impressions are very important of course. We have seen a lot of maps... some are just like.. awefull and didnt put time in this map... yours is different. As far as i know you, you had put time in this map even when your not fully experienced in mapping(Like Crev/Alex)
My first impression was.. Rocks/canyon! I always love those things. You choose for a Symmetrical map (wich is best for a CTF one)
I know when your gonna do rocks it can be very annoying, But i think you made a good thing here, it has Some nice but simple Z-axis stuff outside and inside. Align those texture can be messy for rocks, but i see you did a great job NOT using that "align wall" thingy
The inside was a bit to "simple" for my taste... Much grey stuff for the inside, I had choose to use some trims with a different kind of collor that WILL match
Lighting could also be done a bit better, the outside is okay for me, but the inside could have some small points of notice... You used some tubelights (wich is good) for lighting, but im some area's its a bit to bright, and doesnt have a logical place where the light came from, a bit from nowhere or something. But yes... i know lighting is annoying (I hate it as well)
Back to your build!
Brushwork inside is cubic, simple said. But i really like that tube teleporter thingy
and that round platform in the middle really cut the flattyness (if that is a work... or else i ment the flat floor)
Inside deco has some Xmass stuff. I like the pressents at the flag (without the tree... cause i know its mine) the Xmass textures... simple sheets, but i also dont know where to get good ones
so... its a good thing i guess
The outside part, Well, personally i like it very much! Z-axis, Canyon! Bridge! Attena's! All good for my taste, gives cover for annoying snipers, loads of space to walk. Intressting entance for a base, going underground while there is a platform on top. Normaly many people go "face" tower thingy. So thats a big plus!
The brigde, it hold the important/strong pickups... To get the good parts... dont get shot or shoot them first
good thing for balancing the gameplay a bit
Attenna part, Simple looking but cool
Sniper tower thingy... like i said, looks cool, but it has some annoying things, to get the sniper, you must walk on those beams/or translocator. I wish i was there quicker to kick some butt. I like the teleport, but the first time was annoying, i entered it for the first time inside the base, walked forward, and fellt down (yeah im noob) it was a bit like breaking my legs the first time
maybe should make a warning side there was an edge? But im used to it, is okay for me
Gameplay, is normal, not much special things with a "Wooow!" factor, but its a decent map wich i think people can enjoy playing it.
So... im short words!
Good job on this map! and continue making more maps!
OW and next time... dont be hasty... some people work you know?
just wait... and you shall get rewarded...
....... 
it could make a good sniper server or instagib.
