This add-on is the best on the market for a portal solution in my opinion.
I have used XENPORTA since its release in XF 1.x series and it has met all of my needs. I purchased the current version soon after it was released and I am very satisfied. I give it the max rating based on its meeting its stated functions at a reasonable price.
That said, it is not "perfect." It does take some work and reading of the threads and discussions to implement its features. Perhaps, a user guide or some documentation would be helpful for others.