Will, have a look at how much metal that sharpener grinds off each time you use it. They do give you a good edge but seem to need use frequently and therefore end up grinding away a lot of the blade. A steel doesn’t take much practice to hone a blade, and as Kelvin said, bar any major mistreatment this is all you need.
Been looking at investing in a whetstone for maintaining a Helle knife I got for outdoor utility stuff/fending off fierce wild animals/trying to look like Ray Mears. There seems to be a large array of options of grain, can anyone recommend what I should be looking for?