I had two - one a skeet model that digested thousands of rounds with no issues; and a field model that I later had Nu-Line convert to 3-inch. The field model was used exclusively for duck hunting in the worst of conditions about 90% being in the coastal salt marshes and tidal creeks. This was 1970's technologies and the main alternatives as the time were the Rem 1100 and the Browning A5. It's real easy to compare unfavorably with later-day technology guns; however, if I still hunted waterfow, I would not hesitate to continue with my SX-1 as it never failed me.
