Just wanted to post a positive experience. I purchased a portable 50 amp surge guard, model 34750, from Camping World in May of '13. It faied in Sept, '14. The face of the unit turned black and the plastic covering over the voltage display cracked, plus it would drop a leg every so often. So I called CW and got the usual response that the device was past the one year warranty period and they could do nothing. Since this was my second 34750 that failed with the first lasting over 5 years I was upset. So I called Technology Research Corp, the mfg., and spoke with Kerri. She told me to send the defective device to her and she would see to it that it was replaced. She gave me an RMA number and I was asked to include a brief description of my issue. I was kept in the loop through the entire process and received a new 50 amp model 34750 two weeks after I returned my old one. Even though I paid the shipping to Clearwater, FL I feel it was a mfg. going the extra mile to make it right as my device was well beyond the stated warranty.