My wife and I both have Mark IIIs and enjoy them. I have a Target model with a Tactical Solutions upper and my wife has the Hunter. We put Volquartsen triggers in both. They are fun, reliable, and very accurate. We've had no problems with either pistol. In addition, I shoot competitively and use my Mark III to warm up prior to matches before switching to either my 9mm or .45 ACP match pistols.
STI-Eagle(2)/Trojan(2)/Edge/Guardian/VIP/Rogue/Ranger III/Sentinel/Tactical 4.0/Escort; Remington Rand-1911A1; Ruger Redhawk/Blackhawk; Sig P238