PSV can be a difficult team and I really wonder how competitive they can be against Arsenal. This year, Arsenal is starting to work with Arteta to avoid making the mistakes they made last year. They managed to become a young and offensive team. I don't think PSV can withstand them.
PSV are in Group B and we can all see the form of performance shown by each of them in their domestic league at the start of this season. Of the four teams there, I think there are only two teams that are really strong at the moment, namely Arsenal and PSV because the other two teams are still quite bad in their respective domestic leagues so there is a possibility for PSV to qualify for the next round in Champions League although maybe PSV will not be ranked first in group B.