11pc Spark Glow Plug Socket Set Oxygen Sensor Professional Mechanics Tool Kit worth to buy? Thanks for it if those of you who have purchased 11pc Spark Glow Plug Socket Set Oxygen Sensor Professional Mechanics Tool Kit could share about what you think of the product. I would love any extra info, as it is quite pricey as $56.99 and I just want to know it is good before paying for it.