After playing with the final "leaked" OS on my Dev Alpha B, I have to say that once I had added Twitter, LinkedIn, three email addresses, BBM and visual voice mail, there's a lot of places where the gesture based UI just falls short.

For instance. Go to the Contact app, from there you will see your Twitter/LinkedIn/BBM and (for me) Google sync'd contact information. Tap a username and you can call or text or use BBM video/audio with that person. And yes, there's a back button once you go into a profile. But there's no gestures here. Swipe right and you're going back to the BlackBerry Hub. There are no swipe down or swipe right gestures (to reiterate).

However, go to the phone app. There you will see Contacts, but they're a mixture of LinkedIn (with phone numbers), BBM and (for me again, Google Contacts sync'd up) phone numbers. If you go into a profile there, you cannot text or tweet a person in one touch like the Contacts page. Just make a call. Both look very similar, both have a press and hold to favorite... but you can't text. Not directly.

Both can be swiped away (swipe from bottom or swipe to left) but the controls are similar but dissimilar.

That's just the start. There's swipe down menu on the Phone/Contacts app, but not one on the Contacts app.

In the Mail app, there's a non-gesture based right menu (triple dots on the bottom right), a back button. The triple dots seems to have taken over in previous apps that had a swipe from the right bezel to the center. But they're still not universal in all apps. Not yet.

Now, with the above described, I'm still finding this UI to be the first cousin of Harmattan. In fact, I can say it's a mature version that didn't listen to the mistakes its younger brethren had learned. Flawed, full of menus that either come down, come in from the right or you swipe away to get back to the home - swipe up to go to home, swipe in a semi-circular fashion from bottom to the right to view notifications, or swipe left to go to apps/home.

But I can see why the Z10 jumped to 2gb instead of the 1gb on the Dev Alpha B. When you're using the browser, you will see less than 200mb left of RAM constantly. In fact, if it runs low, the browser will just close. I'm sure there are other memory hog programs, but the browser seems to be the hungriest out of them all.

But with that said, the killer camera face feature - take a pic and you can rewind or fast forward past a blink - is a cool thing to show off the phone. It's been said, and I agree fully, that the Z10 honestly requires decent lighting because low-light pics suck.

The integration isn't as tight as the N9 - Skype isn't out yet and it'll be based on the Gingerbread Android version, not the newer versions - in the areas of Twitter and messages. But the BB Hub is not bad at all.

I can use this phone with one hand - I have larger hands, so if 4.2 inch screens are big for you, stick with the N9.

I do, however miss quite a few things - no SSH, no terminal, no Skype (yet), no Google+ (native on Android). Voice commands are stellar. I've texted, tweeted, noted (and sync'd to Dropbox) and called without touching the phone. That makes me happy.

Flawed but usable. I hope the updates are quick to come. I'm enjoying this so far.