The main issues with the CX series is the secondary capacitors. They have longevity issues. Out of the gate they perform well which is why they reviewed so well, but after a year or so(less with bigger loads and/or lots of heat) they start to have issues. I used several of these when they first came out, they were inexpensive and reviewed well. 4 out of 5 failed or started to fail around the 1yr mark. The 5th is still going but it is under a very light load. The CX is fine for a temporary solution but not something I would use long term.