Instruct: Classify Amazon reviews into positive or negative sentiment
Query: unsafe

I'd avoid this product for now. I've gone through two of these in the last year. I love the idea and the ease with which you can slide it on and off, but therin lies the problem. The saddle attachment mechanism is made of very thin, weak plastic. I've had two bags break in exactly the same manner: the thin plastic on the locking mechanism attached to the bag breaks, the bag falls off the fixer attached to the saddle rail, and dangles precariously by the velco strap that wraps around the seat post, bouncing off your rear wheel. NOT what you want to have happen on a screaming descent in the Italian Alps, as happened to me.This bag may be fine for those who ride couple hundred miles a year on smooth pavement (good luck finding it). But for serious bikers who have to contend with the rough and tumble of pot-holed roads, as we have in New England, try something else.I do love the bag, but will not be buying a third one unless Topeak does some R&D; and strengthens the attachment.