Pros:

-You've actually made the witch Scary :D
-Has replay value
-A LOT and I mean A LOT of creative ideas
-Awesome boss, hard as hell!
-Challenging
-Has a bit of comedy
-Nice atmosphere
-Love the silent hill feel

Cons:

-Invisible walls
-Hard as hell boss! (but still awesome xD)

Conclusion:

This... is.. the best map.. I've ever... SEEN! Actually, this map is the only reason why I signed up for this website xD. I just love the creativity. :D I mean that alone along with the scary witch (especially it crawling upside down in the vents and then scarring the shit out of you at the ladder) gets this map a 100. Don't care what anyone says, this should not be a 91.. at least get it to a 98? Either way I love the map, I want to see more stuff like this from you, and other map makers. :D Good job.