Smardt and Multistack make state of the art flooded chillers, the edge has to go to Multistack due to their microprocessor. Multistack uses a LBV on each compressor to aid in starting a compressor when other compressors are on line without backing down the on line compressors. This one little addition gives them a small performance edge. I cant say enough good about the factory support from Multistack, they have a excellent factory training. All the negative feedback I've heard is on the plate and frame chillers. They are bringing out new equipment not solely based on Turbocor compressors. Big boys better move over, the worm has turned! And I'm with Klove, What is GT1980 talking about?