I purchased their portable 50 amp surge protector 2 years ago. I chose theirs and paid more because I believed it to be the best on the market for total protection. This spring while on a camping trip I began to have trouble with the unit showing high and low voltage and giving faults. I verified with my meter and all was fine. After a short conversation with a service tech I applied for a replacement under warranty. With no hassle and a few pics to verify my unit they shipped me a brand new one at no cost to me. They have a customer for life now.