I’ve never been one to buy “cheap” tools for working on my cars, but I’ll give this one some credit! It’s probably the best $70 I’ve ever spent. I read a lot of the reviews, but after buying this thing and testing it out, I wonder if the competition was paying folks to submit bad reviews. Pulled a spark plug and looked down the hole today just to test it and I could see everything crystal clear! Picked this up on sale from Harbor Freight, and it’s worth every penny.