Never heard of slide issues unless it was a P22, there are a few different version of the P99, a DAO(double action only) version, a AS(anti stress) version and a QA(quick action)
The newest and easiest to get is a Anti stress model(3rd gen) I suggest looking up some YouTube videos, it has a very unique trigger action,
Most people these days lean towards the PPQ as it has the same trigger pull from first to last, your choice of button or paddle style release(ppq m1 navy), and a more aggressive grip.
All that being said I love my Walther P99 AS, it is still an amazing gun, with an awesome trigger once you get used to how you want to shoot it, a striker fired decocker is nifty too, it's my main go to for all things now, I added a talon grip for some more texture and new sights, the gun is a real shooter with some of the best ergonomics in the game. Iam sure I will own a PPQ eventually as well but it won't replace my P99 as my go to.
I'd also like to point out that Canik pistols are based on a Walther design and gaining popularity at a very fast rate.
