Flea/Tick Control for Dogs

Question
I have been using K9 Advantix for my dogs, but it is very costly.  I saw an advertisement for Biospot, which claims to treat all the same things that Advantix does, and is much more cost-effective.  My dogs are primarily indoor dogs, but I do have a back yard that they spend some time in.  Are there any reasons NOT to switch to the Biospot product?

Answer
I would not personally use any of that crap on my dogs. Its ALL pesticides. God forbid you have a cat in the house and it gets on them.

Use FRONTLINE, its a better product and not nearly as nasty as the other stuff. Better yet, use REVOLOUTION! It does fleas/ticks/heartworms.  Revolution is FDA approved and you kill lots of birds with one stone.

:)