The Donna Saliva Test ??

I just heard about this from a friend that is TTCing, her dr reccommended it.

In case you havent heard of it, it is a saliva ovulation predictor, I think it costs about $50.

Which seems better then keep buying the uringe stick tests for like 20.
This one you can check everyday!

Has anyone used this or a similar product and if so what did you think?

any feedback would be greatly appreciated

thanks
kimberly