I'm not sure about the p45, but i just recently picked up a p9 and i can't put it down. it doesn't leave my side except for work. it is light enough and thin enough to carry without strain or notice. it has been accurate and reliable to date. the trigger pull is longer than the glock, but very smooth. as of today, i have no complaints about the p9 and hopefully i wont in the future. if it was a problem, i would've took the loss and traded it in gor the g19 or g23. i do have a love for glocks, but just a lil more in love with my p9.