For general use sharpening, lanksy and spyderco will fit the bill. Owning a spyderco myself, I’m fixed to 20 or 30 degrees, I had to find a system that can get me down to 7-8 degrees with accuracy. Owning japanese cutlery, my spyderco wouldnt have given me the edge I needed. You also have a limitation Stones and lapping films, The systems mentioned above dont allow for precise sharpening and mirror polish hair whittling edges (at least within a reasonable amount of time - how much is your time worth?) many Knife owners love including myself.

But for basic sharpening needs that dont require reprofiling edges, lanksy and spyderco will do the job with great results.