I had two BlackBerry devices for work, right about the time they were going away. I’d heard the keyboard was good on earlier models but it seemed like the quality had gotten pretty cheap on the later phones. The BlackBerry 10 OS on my last phone was actually pretty good, and probably would’ve kept them in the market if they’d launched it 5 years earlier.
It’s hard to explain. The keyboards they built just felt and worked better. They clicked just right, they had the shape right. Once they licensed out production like their Android branded phones it wasn’t as good.
There was a device called Typo that copied their keyboard exactly but attached to iPhone that was good but they must have really copied BB because they got sued into smithereens.