I bought six of these several years ago and six failed one at a time. Very frustrating as I first assumed it was the cameras or cables failing. I never unplugged any of the connections after installation and cannot understand why something so simple would fail.
They only lasted 2 1/2 years. Keep in mind that 1 failed in less then 1 year (yes, I should have pulled it and requested warranty, but I typically wire in pairs for redundancy in critical applications). The cables and couplers were installed and not touched except for once when outlet 1 failed.
PROS: Good price. Some of them still work. Easy install.
CONS: Quality. These only have a one year warranty, not a lifetime.