I'll add my opinion here in case Link has not answered your questions (and also for people who find this thread at a later date by searching).
In short, it is very snug. It's almost impossible to put the Pandora in it without the L and R buttons being depressed, and tbh the first time I tried to put the Pandora in it it was quite a struggle. That said, I don't see it doing any damage to the Pandora, and serves its purpose well. I can fit several SD Cards, some small USB drives and a slim USB hub in there with the Pandora at a squeeze.
As for quality of construction, I can't really comment as it is generally quite subjective, but I will note two things: 1. The edges of the holes found on the plastic sleeves for holding the SD Cards is a little rough, and those sleeves themselves are very loose. Doesn't really bother me, but it could be irritating to some people. 2. The tags on the zips are stitched with a fluorescent yellow thread. It's just cosmetic, but I was surprised by it the first time I saw it.
All in all, I have no problems using the Pandora Case for most things (mostly it is in another, larger bag with my University stuff).