I have a bedroom and large kitchen slides that are Schwintek, and have had issues with both. The bedroom was the easiest to fix, as the power connection came unplugged a couple of times after it was deployed. This was under warranty, and the dealer gave the power line some more slack. I've had no issues with that slide since (KNOCK ON WOOD).
The Kitchen slide has been a recurring problem, and I've had to completely rebuild it once. All new parts from Lippert. Both of these slides stranded me on trips a couple of times, but now I know how to get them to retract even if they are malfunctioning. Search the threads here and you'll find a couple of posts that have the procedures to get these systems to retract after they've gotten out of sync. I copied those and printed out a Word file that I keep in the fifth wheel now, and have had to use the procedures several times. Like Ray said, it's inconvenient, but no longer ruins a trip. You learn to live with them, even if I do hold my breath every time I roll it in.
2015 Eagle 323 LKTS
2018 GMC Duramax 3500