If you get the HF one, get better wheels from Oregon. The corundrum with sharpeners (grinder type) is that the cheap ones are marginally ok for occasional use but they spin too fast, have little torque and burn the chain. Their shafts get sloppy because they are weak with little support and they may or may not hold the chain tight. Soon you have a $39 piece of trash if you sharpen more than once a week. If you use a $300 one you'd see the difference and supports the notion that ignorance is bliss. The problem there is that few people are willing to shell out that kind of money for the "occasional use" but settings are more precise, they run smoother and you actually get a sharpened chain. The $100 one from Northern may be a compromise between junk and halfway decent but my recent sharpener ( not from Northern) cost $169, is just ok, and cannot compare to the one I used to have for the same price 35 years ago that now costs over $300. It all depends on your temperment and preferences of what one values most between money spent and quality of job that the tool does.