I use Star San now. It's really aggravating to fill bottles because the foam makes it hard to see when it's full. I don't see anything in the description about foaming action - what is your experience?
Do you wipe down the fermenter with the sanitizer and leave it wet for a minute, or do you feel it's necessary to fill the fermenter with sanitizer?
Also, Charlie Talley has discussed contact time in a podcast - he stated that although the directions call for one minute contact time, only 30 seconds is needed for brewing. I'm assuming there is no information available about any reduction in contact time. Did you discuss this when you talked to the manufacturer?