Our 2011 3170DS is going on it's 5th year... No problems so far. The slide types are different between the kitchen and rear bunk. I've never continued to depress the button for the rear bunk slide after it's made it's complete travel and the motors change tone. For the kitchen slide you stop once you hear the motors clutch kick in. It will become second nature to where you start to predict the end of travel for both and can release the moment it's been reached.
I'll also note, that I don't believe either slide type that's in these units have to be fully operated to the end of it's travel if you don't need it to. Of course the unit seals up better if all slides are either fully in or fully deployed. But just know if you just need to grab a change of cloths from the rear drawers you can extend the rear slide just as much as you need the retract once done. Done this many times when parked in a regular parking lot and just needed something out of one of the blocked drawers.
Last note, I use regular silicon spray lube on the slide seals, gears, & wheels a couple times a year.
2011 Sunseeker 3170DS - 30,000 miles explored