I bought this watch on sale at a department store and thought I got a deal...until I searched Amazon and found it cheaper here by about $5. Anyway, the altimeter is within 100 feet out of the box. In Michigan, it reads 600 ft to 800 ft on my one hour commute from home to work. I looked up the elevation of the two cities and this is within 100 ft.

I am at the beach in Florida as I write this and it reads - 40 feet at actual sea level. This is accurate enough for me. Through the mountains on the way here, it varied from 200 feet to 1800 feet. I bought it to take with me on my trip to Machu Picchu.

The barometer is also accurate, once calibrated, and changes in pressure can be used to predict changes in weather. In the US, in range of a network, you can get ten day forecasts hour to hour on your smart phone, but out in the "bush" it may help. I like having the world tie function and the stopwatch and countdown timers. I have used the alarm mode also and find it loud enough to wake me up, barely.

The thermometer is a bit of a disappointment as you have to take the watch off and let it sit for quite a while to get the temp. This will let me know the temp when I wake up camping, if I took it off at night, but on the move, it reads your skin temp. I wonder why they don't put the temp sensor on the top of the watch far from your skin? It does tell me the water temp when I swim and has fairly good accuracy in water. I was in a hot tub and it read 106 degrees.

Overall, for about $50, this is a great watch. I did not buy the Pathfinder types starting at about $140 here as they are too big. This watch is plenty big, but it is very light and does not bother me on my wrist. Those Pathfinder models look huge in the customer pictures and seem better for men with really big arms/wrists. I am 6'4" and weigh about 190, so I am on the thin side. Being a triathlete and swimmer, I need a watch I can wear in the pool, while running, and on my bike, so it can't be some big clunky thing.