Hi - we only used SBPS for the lawsuit+appeal, and representing us at our Lisbon biometrics. Our regular GV advisors are NEWCO in Madeira, given that’s where our PT house is, and where our GV saga started.
For the tasks we needed them for (above), I’m generally happy with SBPS (and I am hard to please). Sometimes their responses are a bit obtuse, but perhaps that’s just the circus that is the PT government and legal system. The team seems diligent and dedicated to getting a good result for you. They also speak good English.
I also wrote about them earlier: