Update: Moto 360 is launching today in the US and October in the UK. We added the official release date and price information throughout.

The Moto 360 watch is not only Motorola's circular wonder with Android Wear, it's also Google's best defense against the inevitable Apple iWatch.

First of all, this stylish-looking stainless steel smartwatch has launched in some parts of the world. In fact, we've already tested it out in the US and UK (see our review). Meanwhile, Apple fans cling to vague hints and a rumored 2015 release date after a September 9 tease.

Second, Moto 360 has the advantage of ditching the square-shaped displays of the LG G Watch and Samsung Gear Live. Gone are the computerized boxy designs of the Pebble Steel and Samsung Gear 2.

Moto 360 watch price
Message notifications show up along with custom watch faces

It did have two sharp-edged downsides all summer long. Its price was unknown and that so-called "summer" release date promised by both Motorola and Google never materialized.

Luckily, Motorola announced a reasonable price of $249 (£199, about AU$269) and a Friday, September 5 launch in the US. It'll be available on Motorola's online store, the Google Play Store and and retail chain Buy. Other US retailers and carriers will receive the watch next month.

That's also when the UK is due to receive the circular smartwatch. Moto 360 will be available in early October from O2, Tesco, Amazon and John Lewis, according to Motorola at its September 4 event in Chicago.

It's certainly fit for our variety-seeking 21 century wrists. It just has to get here on time for everyone.

Moto 360 watch face and battery life

The computerized Moto 360 screen features a 1.56-inch backlit LCD protected by Corning Gorilla Glass 3.

That's not the the custom-made circular OLED display we heard rumored previously. But LCDs fare better with white backgrounds, while OLEDs consume 40% less power when displaying black.

OLEDs ability to turn off individual pixels comes at a price. The safer choice is certainly an LCD, and this circular display is no slouch. It still boasts a high 320 x 290 resolution with 205 pixels per inch.

Moto 360 watch face screen
Presumed to include OLED display technology

Samsung Gear Live has a 320 x 320 resolution, so save for a few pixels chopped off by the circular frame, Moto 360 is nearly identical and certainly better than the 280 x 280 IPS panel used by the LG G Watch.

Like both already-released Android Wear watches, Moto 360 will feature an always-on screen, which is a power-saving dimmed display that still tells the time like a traditional watch.

Our tests have confirmed that even with their screens unlit most of the time, LG and Samsung's watches eat up a fully charged battery in a day or day and a half. Motorola promises a day's worth of battery per charge. It's certainly one of Android Wear's weakest points.

Battery life is even more important on a wearable; no one wants to charge a watch before the day is out.