We were very excited about this sandbox.  It arrived as scheduled and was easy to assemble.  We did however experience an issue with this product.   
The bottom liner has hook and loop fastener to secure to the sandbox itself.  The liner has the loop component sewn in equal distances around its upper edge.  The concept is that you adhere pre-cut hook components to the sides of the sandbox to secure the liner (with it's pre-sewn loop sections).  The problem is that the pre-cut self-adhesive strips that were included are also loop instead of the necessary hook.  Bottomline, loop to loop does not stick.  
Still have not used the sandbox as we will have to await rectification from the manufacturer or try to locate self-adhesive hook fastener to try to get by.  Dissappointed.