I bought this to repair a few flaps on a pair of running shoes.  The shoes were initially narrow and pinched my feet.  Just about the time they started fitting well and became my favorite pair, the flaps opened.

I did what I read on another Amazon review indicated, I cleaned both surfaces, applied a decent amount to both sides, and used copious amounts of rubber bands to hold everything in place for about 24 hours.  Be sure to clean off excess goo before it dries.  I don't think it will hurt anything not to, but it's easier to clean before it cures.

Follow the instructions well.  The goo is strong and will do its job if you clean the surfaces beforehand and make sure the objects are clamped together and allowed to cure.

I have not had a problem since applying the goo.  It's a great product and will probably add years to the life of these shoes, all for around $5.