In 2010 my drainfield was failing so I took a chance and purchased my aerostream system. I was skeptical but the positive reviews convinced me it was worth a try. I have a three tank system with infiltrators and in 6 months my system was again functioning as designed. Fast forward to 2011 and now my unit is in need of refurbishing. Within a week I am back in business and could not be happier with the quick turnaround.