ten years without a single problem for my EZ loader boat trailer. other important point, no rollers, only bunks with quick slop pads. i could drive the boat directly onto the trailer, winch, maybe 8'" is all it took. the trick here was to keep the top of the fenders above the water level. folks tend to submerge their trailer too deeply for this drive on to work very well.Just an FYI for those think theres nothing better than oil bath bubs. They need to be used on a regular bassis. If they sit most of the year they will have problems. A trailer shop I have used strongly opposed to using them on boat trailers because they tend to sit around to much.
But he did liked the extra work he got!