The downside to the new operating system is its relative dearth of third-party software. There are applications for Facebook, The New York Times and The Wall Street Journal. A Skype app out will be out soon. But there isn't any app for Netflix, Amazon or eBay. There are no Google apps, either. The selection of games is particularly poor. There's only one incarnation of "Angry Birds," and that's "Star Wars."
I also encountered one glitch while using the Q10 for a few days: I was unable to type my response to one email. Leaving it and going back into it did not help until the next day. That's the kind of problem that's going to frustrate BlackBerry users, so I hope it's a rare one, and one the company fixes soon with a software update.
That aside, the Q10 is likely to be attractive to the BlackBerry faithful. It deserves to lure some people over from Androids and iPhones as well. The keyboard makes the Q10 a good complement to a tablet. Use the bigger screen for entertainment, surfing and gaming, and the BlackBerry for messaging.
When I reviewed the Z10 model in January, I found I couldn't point to anything about it that would make me say: "Forget those other phones: you have to buy this one." I can for the Q10. If you value a keyboard, this is the one to get.