A also have an Open Range with 3 cable slide outs with never a problem for the last 4 years. What I like is the entire mechanism and slide motor etc. is above the slide out, inside the unit totally protected from weather and dirt. I see no problem with them.
I had a Mobile Suites with hydraulic and nothing but problems. Replaced rams a couple of times, inoperative front legs, slides creeping out while in transit and replaced hydraulic pump motor and lots of hydraulic leaks. Never again will I have hydraulic.
The cable slides are so simple there is not much to go wrong.