A novel idea, but not one that was executed very well. The original map wasn't very good, and this one isn't either. The hallways are cramped, the way to the flags is too confusing, and the main arena is uncomfortable and has untextured sides. An all-around mess.
This modifcation of Dave Baily's map is my first attempt at CTF. For some reason some people like it though personally I'd choose CCR2 (part of Magenta Filter 1.3) This version works with CTF lua 4.0.2 so you guys can stop bugging me to email you maps. ;) The readme goes in to further detail.