Editor's note (Sept. 24): This review has been updated to reflect more impressions and results of iFixIt's Series 4 teardown .

Big; beautiful display; Advanced health sensors; Faster processing power; Useful Raise to Speak Siri

ECG app not available at launch; Expensive

Apple Watch Series 4 has moved the smartwatch to an all-new level and it provides an excellent companion for anyone who wants to keep an eye on their health, their fitness and wants to stay connected with or without their iPhone by their side.

Great design; Larger screen; Cellular connection; Heart sensors; Fast and responsive

No third party watch faces; No roaming with cellular

The greatest Apple product comeback story of the past few years has, without a doubt, been the Apple Watch. Launched with great fanfare four years ago , the initial version tried to do way too much with way too little , and it had confusing software to boot.

Great battery life; Huge; beautiful screen; Health-tracking features; not just fitness

Siri is still unreliable; No always-on screen option; Complication options can be confusing

I've been a consistent Apple Watch user since the wearable first launched back in 2015. While I wasn't always on board with the Apple Watch as a concept, it's gradually become an essential staple in my life.

Stunning looking display; Best smartwatch out there; watchOS 5 is great

Expensive; Lack of third-party Watch Faces; Unclear when ECG features will come to Canada

If you don't have an Apple Watch yet, you should get one. And probably this one. Yes, it may seem expensive and extraneous if your already have an iPhone and maybe an iPad and laptop or whatever, but here's the thing: It can save your life in a way none of that other stuff can.

Roughly two-and-half minutes into my run, the watch kicks in. There's a haptic buzz on my wrist. "It looks like you're working out," the watch face reads. That's followed by a big, yellow button, suggesting I start an indoor run.

Just as Samsung, Google and the Wear OS gang look like they're catching up to Apple, it goes and streaks ahead. The truth is that the Apple Watch Series 4 is in a different league right now, and balances style, features and specs to make an excellent smartwatch.

Better design; Lifesaving metrics; Top sports features

More expensive; Battery life still short; Siri integration still not great

We've covered only the most significant differences in the above comparison - we didn't even have time, for example, to mention the cool new dynamic watch faces available for the Series 4's larger screen. But hopefully you get the idea.

If you take a look at the smartwatch market, Apple and Samsung are currently the two manufacturers that stand out most from the crowd. And it's exactly these two that have now launched new models, the Watch Series 4 and the Galaxy Watch , respectively, which of course are supposed to be better than...

Alongside the iPhone XS , iPhone XS Max , and iPhone XR , Apple used the special event at the Steve Jobs Theatre in Cupertino earlier this week to unveil the Apple Watch Series 4 . The launch represents the biggest redesign to Apple's smartwatch since its introduction in 2015 .