I have been shooting International Defensive Pistol Association ("IDPA") meets for now over three years; and I am also beginning my second year shooting United States Practical Shooting Association ("USPSA") meets. I initially vacillated between shooting my wife's CZ 75-SP01 9mm and my own Walther PPQ M2 (5 inch barrel) 9mm. The CZ, which frame is steel constructed, has significantly less muzzle flip; but the magazine release button on the CZ is poorly located requiring me, even with large hands, to use the non-dominant hand to engage the release button. Also, I found the Walther slide release lever to be readily available with both the slide and magazine releases easily engaged with the same hand holding the gun. I have now concluded, without reservation, that the Walther is the very best hand to use for IDPA. I know, many have complained as to inadvertent engagement of the magazine release button; and I encountered the same problem initially before I improved my grip. Now, it never happens. I know that the folks partial to Glock, S&W, H&K, etc. will most likely disagree with my opinion; but the engineering which went into the Walther is readily apparent. In case anyone is wondering as to what I use for USPSA events, I am now experimenting with use of my Smith & Wesson Model 27 (8 3/8 inch barrel) .357 magnum. I am not using my Walther because (1) the .357 magnum qualifies me for "major power factor" with the USPSA, and (2) I attend the IDPA and USPSA events to improve my safety, handling and accuracy of firearms owned with the USPSA more suitable for the revolver which I intend to carry as a side arm when hunting in those states permitting same.