Update, after a month of daily use:- Dropping my rating to three stars. It's not the hardware, it's the software.- BlackBerry Passport power users: you *will* miss BB10.- Android has stunning issues and omissions (like a lack of default, OS-level control of the sounds/volume/notifications! You have to use wonky, inconsistent third-party apps to do things BB10 had from the factory)- The keyboard really IS too small for my large fingers. Using the phone every day is not helping, it's only making me miss my Passport more. If I could type accurately on such a tiny little physical space, I wouldn't be so against touchscreens in the first place. I could just get a Note or an iPhone. This device needs to be 20% wider!- Note to TCL: Please make a larger model! The whole premise of BlackBerry and the physical keyboard is productivity. Leave the dainty small snapchatting phones to Apple and the gaming to Samsung. Place productivity above all else ("Tools, not toys!") and you will have a customer base.Original review:To start, I should declare myself a bit of a loyalist. I transitioned to this phone this week, after three years with a BlackBerry Passport -- by far the best phone I have ever owned. My remarks will probably be most useful to those considering a similar trade up.Most of the weakness of this phone are inherited, directly or indirectly, from its operating system. Android is powerful, and indeed enjoys a broad ecosystem of apps -- but it is still a clunky, intensely frustrating experience for me, even though I'm very familiar with it through my Kindle Fire and my Android based Sony Bravia smart TV. In no iteration is it devoid of bugs, or anywhere near as bug free as BB10 was. Alas, BB10 simply arrived too late to hold any market share, so to move forward one must either accept Android, or switch to iOS.As a handset, the KeyOne Black Edition was probably the best of my options. I sorely miss the square aspect ratio, hefty weight, and wider keyboard of the Passport, all of which made it ideally suited to productivity tasks, and rapid typing with zero autocorrect. Yes it was big, but that is exactly why I loved it.The KeyOne is very similar in size to an iPhone X, if that provides a point of reference. The keyboard is not as instantly usable as the Passport's was to me three years ago, as I have big, clumsy fingers. However, it feels a lot like my old BlackBerry Curve, and I do welcome the return of the shift and alt keys, which are extremely useful. Overall I would have preferred a slightly larger and heavier device, but I recognize this one needs to be all things for all people, and some folks insist on a phone that can slip into a tight pair of jeans or a purse. It looks sophisticated and worth its price.The reports of acceptable battery life are legit. Under heavy use, with lots of app installations during my first week with the phone, I am still making it through a full day with 50% of my battery to spare. Solid work from TCL here. Likewise, while the general specs are roughly a match for mid-level Android phones, the extra gigabyte of RAM is a good idea and I feel it (and the additional storage) are worth the mere $50 step from the regular KeyOne to the Black Edition.The camera is great, and can be further augmented through apps if you are so inclined.Every single gripe I might have would also be true for any other Android device. And yes, I have many of them. But none are BlackBerry or TCL's fault. The BlackBerry Hub survives and even improves over BB10's already very effective design. I easily set up multiple email accounts, color coded them, added social media accounts, etc. Alas, after four days I discovered there is no native sound profile app on Android -- one must use third party apps for that, which took hours of trial, error, and configuration for a feature BB10 had fully integrated and out of the box.Overall, though, this is a solid device. It sounds as if KeyOnes have sold well, which raises my hopes that we'll have new models to eventually continue the line. If, like me, you find pure-touchscreen devices deeply infuriating (after two years with a Kindle Fire I still can't stand even doing simple Google searches, because my touchscreen typing accuracy has never improved), you will appreciate this phone.Tactile keyboards are NOT antiquated -- otherwise why do our computers and laptops still have them? You can't say that's purely for nostalgia, or solely to placate a narrow sliver of backwards consumers. It's because when real productivity and accuracy is needed, only a real keyboard provides it. I don't use my phone solely to snapchat with my neice or tweet about my cat. I do serious writing and heavy email, often with many abbreviations and technical terms. For such things, this phone may be among the best out there.