Instruct: Classify a review into positive or negative sentiment.
Query: FOR THE SURFACE OF THE POOL - NOT THE DEEP END!

This watch was fine as long as I swam on the surface of the pool. After 20 months I made several trips to the bottom of the deep end - 9 feet - and the slight increase in water pressure caused condensation under the crystal and I had to replace the watch with a 100 meter model. Other than this, the watch performed flawlessly.