Someone posted a reply inregards to SCU being junk. I dissagree. Yes there are different forms of N but $ for $ SCU's work the best for most residential/commercial properties. Besides who is going to foot the bill for the high costs of MU's or IBDU. I personally have used all forms and $ for $ PCSCU's are by far more bang for your buck. That being said Uflexx is a product that I like as well.