Have you tried the Walmart "cheapo" version of Frontline, and if so, is it as effective on fleas as Frontline?

I see the ingredients in the Walmart version are exactly the same as the ingredients in Frontline. I love a bargain but when it comes to fleas, I feel it’s best to err on the side of caution.

Have you tried the Walmart version of Frontline, and if so, is it as good with killing fleas on your pets as Frontline?