I bought this about 6 months ago and it died. It all started about 2 days after i bought it. Whenever i would hit the big button to turn on the light on the watch it would make the numbers impossible to see. I thought it was a normal reaction to dying batteries, so i replaced them (I had just received the watch). That seemed to fix the problem for about 1 week. then it started to get worse and worse. I replaced the battery 2 more times (making this bargain watch less bargain). Then yesterday it died completely when i tried to turn on the light on the watch. I will go with a polar next time. it may be more expensive, but my friends who have them are still using them while i am burying mine in the back yard in a solemn ceremony tonight. 'Ave Maria'

I bought this for my husband when his cardiac therapist suggested he should have one at home. He finds it easy to use and the therapist said it was exactly what he needed. A good price for something that is essential for recent cardiac patients!

Sensory works well with moisture. A little salt in the water could start the sensor quicker before you sweat. Sometimes the sensory needs to be moved between standing and seating. I got the electrolyte gel that is used for ultrasound, it is easy to apply and works better when standing and sitting.
Replacement batteries can be found on-line in packets for significantly than getting them locally even when considering WalMart. While the rubber O ring seal for the battery opening next to chest works, it can get distorted. In which case sweat can get into the sensor which stops the signal. I was able to resurrect my sensor by using pure Reverse Osmosis or distilled water which was able to dissolve the salt inside the sender and wash it out. The sender when dried worked again. You can use waterproof tape over the battery cover as an additional backup.

The watch work well as just a watch. It has the same battery as the sender. I replaced batteries with about a 6 month interval.

Can't recommend it. Just like other reviewers, the battery was dead after a day. After replacing battery, the item still never worked right.

Ended up throwing away since I was past my return date for Amazon (I didn't open it for a while after getting it)

It is crucial that you have a lot of good quality batteries for the sensor transmitter....if not, you will have decreased range of transmission, faulty heart rate readings and shorter usage times....

I got cheap 8 packs of the batteries and I wear the monitor for 30 minute runs....after 2 weeks, I went through all my batteries....

The monitor will still work, but the range is decreased and I get faulty readings...

You have to put a conductive gel or just sweat a little on your chest in order to have adequate heart rate pickup by the sensor...

otherwise, it does what it says it will do for a good price