The biggest issue with the CX series it their use of Capxon secondary capacitors, they can't take the heat and higher loads so they have longevity issues. The CXs work good out of the box(why they reviewed well) its time that kills them. From what I have seen and experienced with them the have an avg life span of about a year. Longest I've seen one last was ~18 months shortest was about 2 weeks(refurb sent as a replacement). Here's what it it look like if one of the caps pop.
https://www.youtube.com/watch?v=kj8-wNmYJvM