I have been using this series 4 edition with gps for some time now. here is my honest review. this watch feel really good on. you can wear it on all types of clothes may be it casual or formal. the look is super stylish and one of a class. which makes it different from any other smart watch. this gps version does not require a phone. you can make calls text someone and do all kinds of work from the watch itself. this is something really unique. is has the apple ios which is absolutely user friendly and easy to work with. the watch is a little bit expensive then other smartwatches. the dial of the screen is pretty small which sometime makes it difficult to work on. typing messages are really hard. on the other hand making calls and viewing pictures are easy and on the go. the battery life is pretty decent and okay to go. I might say that the battery life is average on perfomance. overall review-3.5 stars