I have owned this particular model for a long time now and have been very pleased.  It is very durable and lasts forever.  It survived two replaced batteries and many bangs and bumps along the way.  The biggest weakness of this watch is the link that connects the watch to the band.  Over time it breaks and is difficult to replace but considering this model lasted me this long, I don't consider it an issue big enough to give it anything less than 5 stars.