I received my order and here are my observations.
Pros:
They are neatly packaged in lots of 50 pcs. (I ordered 4 sizes, 50 ea)
The card stock is excellent quality.
The card stock is thin which makes for easy stapling compared to thicker cards.
The cutting of the cards to shape is neat and smooth compared to some I've ordered elsewhere which look like they were die cut with perforations and torn apart.
Overall, a quality product. While 1.5 mm may not seem like much, as a collector of non-standard
US coins, a touch of extra room is often needed, also as pointed out with thicker coins.
Cons:
Some might find the thin card less desirable when applying to thicker coins.
The holes match perfectly but one side is about 1/32" shorter than the other.
A little work is necessary as the fold sometimes is slightly crooked from one side to the other.
I love the 37 mm size. I need to order some 40 mm to see how they work.
Shipping time was quite fast, I ordered on a Saturday, they arrived on the next Thursday 2 days ahead of estimate.
I apologize for posting in the "wrong" category. I'm not as familiar with the categories as others might be.