This Map was created back in 1.4 and therefor basically only relies on redstone. In the meantime it has been updated to fit 1.7+.
The fact that it was developed back in 1.4 means, that you can't expect too fancy commandblock stuff from it. This doesn't stop the map from beeing a lot of fun and still quite challenging though. So go get two of your friends and try it for yourself.
It is highly recommended to play in 1.8+
since nbtdata was changed in 1.8 and therefor signs may be unreadable if opened in 1.7 and below.
This map is packed with cooperative Puzzles, Parcor, etc. and provides a minimum of 30 minutes of gameplay (if you always solve everything ad-hoc, but i wouldn't count on that).
But expect it more to be around 1-1.5 h if you play it for the first time.
Follow the instructions on the signs (it helps, believe me)
WARNING: This map is only playable if you are 3 Players!