I had a recent production L9-A1 for about six months. The gun was well made and very accurate. The trigger was one of the better examples in striker fired pistols and the sights were very precise when you got used to them.
The Steyrs have a long history of minor problems and reliability issues. Early Steyrs had a poor extractor design that resulted in erratic extraction - they were very picky with rim dimension. I've also heard of issues with the original loaded chamber indicator. Later guns (-A1s) have an improved extractor design that is more reliable, a standard accessory rail, a better grip texture, and a roll pin under the rear sight that keeps the striker under constant tension when the trigger is pulled. This gives a smoother pull. Early guns without the roll pin had inconsistent triggers pulls because the striker could move in the (slightly) oversize bore it sits in.
My L9-A1 was reliable with +P ammo, but often failed to extract spent casings from the chamber with standard pressure ammo lighter than 147 grains. Ejection was consistent when it extracted. Steyr obviously tunes the guns for a long service life with high pressure police and military ammo. A lighter recoil spring would probably improve reliability with practice ammo, but they aren't available. You could modify the factory spring by cutting a coil or two off, but the recoil spring is a flat wire piece captured on a plastic guide rod. I didn't want to mess with the spring and I don't like ammo sensitive guns, so I sold it.