Cogent Communications?

Has anyone heard anything about Cogent Communications (www.cogentco.com) or done business with them? Their product is a dedicated 100Mbps of transit for $1000/month. Quick rundown: Metropolitan OC-48 rings, with no more than (24) 100Mbit customers on each. Nationwide OC-192 rings between the MAN rings with extensive private peering. Any feedback would be appreciated. thanks bill -- William J. Petrisko (WP5) Network Engineering bill@axient.com Axient Communications