I was able to sneak out from work for "lunch" Tuesday and put the first 65 rounds downrange with the new G20. To tell the truth, this was the first time I ever shot a 10mm since I first saw the Colt Delta Elite back in the mid-80's. I have nothing but good to say about this pistol and I wish I had not waited so long to get a 10mm. I put 50 rounds of Remington UMC 180gr FMJ and 15 rounds of Sig Sauer Elite Performance 180gr FMJ downrange and both performed flawlessly. I picked up the ammo Monday from Cabela's (Remington approx. $35/box of 50) and Academy Sports (Sig Sauer approx. $26/box of 50). I was very impressed with the Sig Sauer and with it being $9 Cheaper per box it will be my go to factory ammo, but I can't wait to get all of my 10mm reloading equipment and supplies in to get the prices down even more.
Excellent choice + welcome to the world of 10mm.
The Gen 4 G20 is a great pistol; enjoy!