chose the Isobar brand on the advice of the dealers that sold me my robotics and tablet computers. perfect set up for plugging in multiple computers and computer driven robotics from the same source - eliminated 'noise' that was apparent with an ordinary surge protection device. The extra long cord (15') was ideal for my situation . Havent seen a lower price on this unit than I got here from overstock.com. most internet retailers did not have the model with the extra long cord available. very satisfied with this product.