Heh, as for overrated downloads, somehow "Carrotus Squash" by martin comes to my mind. Another very overrated one is "BloodBunny's CTF Pack" by stripe (heh, no offense, both guys are absolutely level gods, i just didn't like the two mentioned downloads as much as the other reviewers did :).
Most underrated is "ZA's Good Side" by Disguise and Distruct and "Mission Uncrossible" by spy.

The older of you may remember :)