I found the process easy to do, minimum of fuss.
Glue works very well.
As it is the first time I have used this product cannot yet verify it's durability with keeping the JigSaw pieces glued together.
The JigSaw Puzzle Glue Packaging states "PERFECT FOR 2-1000 PIECE PUZZLES!"
The Directions state "COAT BOTH SIDES FOR ADDED STRENGTH"
Following these instructions the Glue will only cover ONE - 1000 Piece JIGSAW PUZZLE.