They're really decent sleeves. That said, I wouldn't pay the regular price for them. The quality is definitely there though, and you can see all the artwork unlike windowed paper sleeves. The flap tucks in nicely and easily, and it keeps the disks protected well.
I should note that I never actually rate the delivery. It's always 5 stars from SMS/Linkyo. It's just dumb to increase a product's rating because SMS got it out fast and UPS or FedEx did a great job getting it to me. So:
5 Stars for "Delivery" This is actually 5 stars for a really excellent design. If these were priced lower I'd stop using paper for my, "at cost," product and use these exclusively. I like them that much.
2 Stars for Price If we were seeing these closer to the $0.03-$0.04 per piece price point I'd consider that 5 star pricing. I may call SMS and see what they can do for me on 1,500-5,000 pieces though.
5 Stars for Quality They deserve every bit of that 5 stars too. These are very well made and will not disappoint.
4 Stars Overall This is a simple design that I only wish I'd have thought of myself. The flap is cut so it folds into the sleeve itself easily and will keep the disks from falling out or being damaged provided they're handled with the bare minimum of care. Again, the quality is superb as well. This could easily be a 5 star deal given a better price-point. At their current price, however, they're only slightly less than the actual polybox cases I use for singles and two CD sets.