I have worked on 3 or 4 occasions only, but I had in general good experiences. I cannot comment on the quality of the translations, I order them for other colleagues and I do not have any feedback at this moment.
Wat zijn volgens u de sterke punten van Vertaalbureau Perfect?
Good follow up, quick response, so far my requests have been dealt very quick and professional.
Verbeterpunten of tips
Maybe give the chance to do this feedback survey in different languages?
Also about this survey: I do need to react on 'Information op de website' and Kwaliteit vertaling. I would like to leave the questions open as I cannot give my input, but it is not possible, so I just give an average answer.