I used boardvitals and please don't waste your money with them. The questions they have are not the ones to expect on the ANCC PMHNP exam. I will recommend simply putting your money on ANCC questions...
Just passed my 2016 PMHNP exam! I was nervous since I heard they modified exam earlier in the year so I was not sure if they were going to throw in a curve ball. But happy to say my preparation helped...