Norman, the Walther PPQ is just as reliable and accurate as Glock's or Sig's. I own all three plus many other brands and can personally attest that the Walther is the best bang for the buck out of the three brands you mentioned. Enjoy Sir!

Norman, You got a great gun with a great set up. Biggest thing is get to the range and practice. Take a pistol class from a professional if you have the time and money. Learn all you can about the firearm. Safety first.

sounds like you got the gun you wanted and liked the best all 3 are great guns and each has its advantage and disadvantages take care of it and it will last you a lifetime enjoy it and go shoot as often as possible

I'm not a Glock or a Sig fan. I believe in using new brass case ammo in any of my pistols and cleaning them after shooting them every time. Follow the instruction book that came with your pistol when cleaning and lubricating it and you shouldn't have any issues. I do what you did and research them and buy what I want , not what everybody thinks I should buy.. If your pleased with your purchase that's all that counts.