I thought Devolo represented the top and the top o...

I thought Devolo represented the top and the top of the line at the powerline level. As a private individual, I have 6 Devolo CPLs including two from 1200 and 4 from 500 duo +. Power supply problem making a sharp noise in standby mode on the 4 dLan 500 duo + (since replaced by return) but one of those exchanged also broke down on an RJ45 port (three and a half years later therefore out of warranty of course)