Get what you pay for!
Your review: I already had the drill bits for this, and I already had a tap holder. The only downside to a left turn tap is that you have to either custom order bolts for them or make them yourself. Which if you're ordering this to begin with I somehow doubt you can't make some bolts on a lathe for it.
Works great! A little bigger than I expected but works fine!
All and all it was a great investment, but shipping and handling was like... $11 bucks... That was the only negative aspect I can think of!