OK with Modification.
The slate part is only inset into the clapper by about 1/8" an they have a reputation for falling apart right out of the box. So before even using mine, I ran acetone into the crack to solvent weld the slate to the clapper, and then used two tiny bottles of superglue gel to put on a bead along the edge on both front and back. It has held up fine thought four days of shooting so far. For me, that is well worth the effort and slight additional cost considering how much other slates cost.
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My only other complaint is that 'night' is misspelt.
ProsInexpensive, easy to use, functional.
ConsNeeds minor modification if it is to last.