Stopped buying from there a few years ago - I got a group of Guppies for my Mums tank and most were dead in the bag by the time I got home (20 mins drive) and I never truly trust the staff because they miss basic questions and have limited knowledge of species past the fact sheets provided - though this does not encapsulate all pets at home.
My favorite situation was a few months ago I needed some water conditioner half way through a water change on a weekday night (P@H are open till 8 near me) and I had a quick look at the fish, there was a tank full of African Butterfly Cichlids labeled up as "American Cichlids" I talked to one of the staff and grabbed a Cichlid book of one of their shelves and showed him what the fish actually was - he said they came in but no one had ordered them so they had no idea what they were but they looked American...
I think the general opinion is that if you have one that you can trust whole heartedly then go for it but if its a bit iffy there is a reason
Wills