I've eaten at several of the other chain locations for Paul, and found the sandwich here not as…read moregood as some of the other locations (the same chicken sandwich). It's a convenient place to grab a sandwich or a pastry before your journey via train, or right after, and there's a pretty decent selection of pastries - croissants, pretzels, bread, etc. If you want a sandwich in the morning, your options are a little more limited - they have ham and butter and a chicken sandwich.
I got the chicken sandwich one morning, and it had so much mustard in it, it was almost inedible. It seemed like someone had dumped half a jar of dijon mustard into the sandwich. Don't get me wrong - I love mustard, but this was excessive. I've gotten this sandwich at other Paul locations various times, and it's had mayonnaise inside or small amount of mustard and it's been really good, so perhaps this time around it was a fluke. The chicken sandwich is not cheap either - at 4.95€, it's a bit expensive for what you get compared to other sandwich places around the city, but you pay for convenience.
I'll still come here to get a sandwich before a train ride, and it's probably one of the best options when you're in the train station, but it's pretty standard or in my experience, sub-par for a Paul.