Nine months since the launch of the product, it's clear Microsoft have fixed a lot of the bugs reported by the initial reviewers. In fact, the device goes through a LOT of updates in the initial start up process. After a couple of days of use I haven't encountered any bugs that significantly impact usability.A few other thoughts:- The hardware is an amazing design, with an outstanding 360 degree hinge. It certainly feels premium, and it's barely thicker than my Samsung Galaxy S20.- The dual-screen form factor is really useful. It's great to be able to pull up my personal and work calendars side-by-side for example, or look at Google Maps on one screen and a browser on the other.- The book "posture" is superb for using it as an e-reader with the Kindle or Readly apps, whilst in landscape mode tapping away on the bottom screen is effortless for writing texts or e-mails. This is where the dual rather than folding screen approach shines through.- The wider screen, even in single screen mode, is more engaging than the thinner, longer screens of traditional candy-bar phones. Who knew?- The USB-C port reportedly breaks very easily, and it certainly looks quite fragile. Indeed the whole device appears beautiful, but brittle. A metal chassis rather than one covered in Gorilla Glass might have been a better choice. I'll see how well it holds up over time.- A number of features are missing that you would expect from a premium phone, so check out the specs carefully. Whilst the device is wonderfully thin and light, I feel those compromises might have gone too far. I can live without a 3.5mm jack, high-end camera(s), SD card slot, outside screen, 5G, two day battery, stereo speakers etc., but wireless charging is a big miss in 2021, especially for a device that has a delicate charging port and a relatively small battery.- The hinge makes viewing movies across both screens unworkable, but folding screen phones aren't much better because of their squarish ratio doesn't leave much screen space for actual content. A cheap 16:9 ratio tablet is still a better media consumption device. That said, viewing a movie in the tent posture is about the same experience as a typical 6"+ candy bar phone.- The version of Microsoft Launcher is NOT the same as that for other Android devices, I'd like to add more buttons to the taskbar, and change the grid settings, but that's not an option. If you don't like the Microsoft Launcher, good luck finding another one that recognizes the Duo's unique screen layout.- Cost: its launch price of $1,500 is just too much for a device like this, especially as I don’t think a dual screen should command the same premium that a folding screen can.- Ergonomics wise, it comfortably fits in a pocket, which I was doubtful about before it arrived. However, using it as phone without a headset or earbuds is faintly ridiculous.In the end, the bargain basement prices right now provide a great opportunity to try out the format. There’s a trade off between screen real estate and the size / weight of a phone. In the past, I’ve found a bigger phone to be just that – the same functionality, just bigger. The dual-screen format actually offers more. Sure, it’s a first gen edition but the bugs seem to have been largely ironed out.