Rubynho,
I think it is important to recognise that not all airlines perform aptitude testing, so PAT of any kind is not necessarily the best product.
For example, Ryanair only do tech/HR interview + sim and for that the AirlinePrep App has a very good feedback brief on what to expect. Better than that though, AirlinePrep app offers tutorial and guidance written by airline recruiters on how to perform well.
A common mistake made by applicants is that they think they will perform well because they know what to expect at the assessment but they still fail. That's because they didn't know how to demonstrate their skill set or articulate their answers in the correct way. The AirlinePrep app addresses that problem with tutorials combined with feedback questions.
Just my viewpoint.