In it's current form, it started as the HS2000 in Croatia as a weapon for their military/police. Springfield picked up the US license in 2002 as the XD-9. It's still manufactured in Croatia.
Cleaning wise, I don't think you'd see any problems at all cleaning it every 500 rounds fired. If it's your home defense weapon, I'd probably clean it a little more frequently than that.....just to be sure.
There have been endurance tests done with the XD, freezing it (wet), dunking it in mud, sand, dirt........followed immediately by a hundred or more rounds.....no misfires. Thousand round tests on a weapon that already had 17500 rounds through it.