I miss playing in the zombie server sometimes.
Two problems I've been having with it in the past month:
Constant map resets.
Lag.
Too many players.
It's a little disheartening to not be able to play in it because of those reasons. Of all the zombie servers I've tried on CS this one is my favorite. I hope something is done about it soon. However, I'll understand if it must be laid to rest.