It's horrible, we used to have it until we got complaints everyday and canned it. I wouldn't touch it or Verio if my life depended on it.
Think about, cognet costs $1000 for a dedicated 100 meg line.
Verio costs $1700+ for a dedicated line.
Normal bandwidth costs $4000+ for a dedicated 100 meg line.
There is a reason for this.
Good luck,