The water cooled system is nice, no worries about drawing temper, but it removes metal slowly.. It does a great job on scissors, pretty good on chisels, plane irons, turning tools, etc. if you take the time to set up the jigs, some of which can be a bit fiddly. If you sharpen a lot of gouges you will put grooves in the wheel that can be a problem when you sharpen a straight bladed tool, and truing the wheel takes both time and life out of the wheel. If possible I sharpen my tools in groups so I can do all the curved edges first and only true the wheel once before doing the straight blades. I rarely use it for knives, primarily for grinding out damage. I find the grinding wheel is a bit too coarse an abrasive to go straight from it to the honing wheel without a couple intermediate steps. If I used it more I might get another grinder and set it up with one of the finer waterstone wheels that are available, but so far a bit of honing on bench stones before going to the honing wheel has been sufficient