I had the M9 and M40, bought them when CDNN had them for like $350 each. They were my first pistols I had for carrying, and I preferred the M9. I was fairly new to the shooting sports, and if I had the chance again, I would like to obtain another Steyr pistol in 9mm.
Triggers were ok, nothing to write home about.
Sights were definitely unusual, and thats really why I want to retry one, now that I know a whole lot more about sight picture and focusing, I think I would enjoy shooting with the trapezoids.
The M9 functioned flawlessly. The M40 seemed to have a really tight chamber, and fmj ammo that had heavier bullets (165 gr and higher) tended to not want to go fully into battery. Defensive ammo performed just fine.
Some say they have a hard time finding holsters, but I found that High Noon Holsters had good options for the Steyr pistols. I am sure there are a handful other outfits that also can make them.
Eventually, I settled on carrying a Kimber TLE instead, and to help fund that purchase I sold off both Steyr pistols to a gun shop. Nearly recouped my investment in them as well, the shop gave me $300 each on them.