Those of us who turn wrenches for a living like Snap On for the quality and durability. Those of us who are hobby mechanics (like me) like Craftsman for the price and lifetime replacement guarantee. Even if we don't like to admit it we all have room in our tool box or garage for tools from Harbor Freight. If you do shop at Harbor Freight, you can get good discount coupons by visiting their web site, better ones if you sign up for email distribution, and even better if you pay $30 annually for their Inside Track Club.
I found a website where you can get all the discount coupons and codes, including the Inside Track Club ones, for free:
Harbor Freight Printable Coupons
I used a coupon from this site yesterday to purchase an air compressor that normally sells for $220 and was on sale on their site for $180. The coupon from this site dropped the cost to $160.
2001 Bonneville SSEi (retired at 365,000 Kms.)
2014 Jeep Grand Cherokee Overland (yes, I know its not a GM)