We purchased the Spitfire Dialer from OPC-Marketing two years ago, and we haven't had any problems with it since then.
I am the owner of a Call Centre automation company in New Zealand, also servicing the Australian market, specializing in Outbound operations. I have sold a number of different predictive dialer systems over the last 10 years.
I bought my first dialer from OPC in 2004. It's 2011 and so far I have bought 6 systems from them. Not one issue never breaks very tough and great systems.
My company has used OPC spitfire dialer systems for the past 2 plus years and have had tremendous success with their products. we recently upgraded the older version to the new Enterprise edition and it looks and functions great.
We purchased the Spitfire Pro Several years ago and it has worked great for our call center, with the versatility of having remote agents using VoIP and on site makes this system one of the best out there on the market.