I Tried them once, If i remember correctly my conversion ratios were extremely shitty (long time ago)
I've sent mainly UK/DE INT Traffic to NOCC, Converts Great [No Current US Line]
Tons of great promo material too (Live Cams) etc. webmaster.nocreditcard.com / webmaster.one2one.com
I'm currently with
These Guys
Ugly Promo Material, But Great Conversions & Great Rates
Working US Drop Charge solution as well. Extra xx - xxx daily from US Drop Charge Calls. (404 Traffic)