Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: When is a knot not a knot?

The studs as knots are beautiful, but the knots as studs are terrible. They fell out of the dress shirt I bought along with the studs. Either the button holes are too big (not likely or the backing for the studs is way too small. They do not "pop out" they don't even stay in the hole, but just slip out. This is a good example of bad design. What do I do, sew up the button holes? Send out the silver studs to have larger backs soldered on? Something just isn't right here.