Not much to go wrong with the stock one unless the check valve fails or loses a lot of oil pressure for some reason. On the BMW K1200GT when the hydraulic one collapses due to lack of oil pressure it pretty much craters the upper valve train to around $5,000 to $13,000 in damages. BMW came out with about 3 iterations of the hydraulic, spring, whatevers, and finally decided some chain guard anti-jump flimsy plastic thing was in order. APE made a manual to address it. There were a lot of cam chain jumps on that model over the S which seems very rare to jump.
Here is something on the manual APE one I installed in the S. Mine goes out of warranty in 5 more months so I'm not sweating it (I'd put the old one back in should I need to take it in for something BMW would squawk about.). It quieted it down a lot and idles much smoother too.
For those who have installed the APE Cam Chain Tensioner?
APE made it for some racing team that had bad luck with the Yamaha hydraulics and they since switched to the S and wanted the same thing done so it got a manual adjuster too.