44m Series 4 ==> Good upgrade to the Series 3

The added 2mm larger size vs Series 3 just looks better, crown and function button feel a bit better put together. the heart monitor does indeed function more accurately vs Series 3. Rubber strap is nice, stays on securely and not uncomfortable- but is a bit bland looking compared to the Nike+ black sport band. However that is an easy change with any of the nice aftermarket bands available. Purchased from Amazon directly, prompt shipping and safely packed in an oversized mailing box.

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