I had the Motorola Atrix as a upgrade from my Blackberry 9700, after owning it for about 3months now I think the Atrix is a great phone.
The internet is much faster than that of my BlackBerry, the screen is fantastic, many of my friends have iPhones and I believe that the screen on the Atrix is more realible and has a better sensitivity on the touch screen. Videos look amazing too. The camera quality is good, however a dedicated camera button would be helpful as you have to use the screen to take the photos.
One issue I faced when buying such a fast, hi-tech phone was the battery life. I googled for ages trying to find a realible source to prove to me that the battery life is worth it, and it is. I get on average 54hours of charge from one charge, I'm a heavy user, average of 300texts a day, WIFI on 24/7. Recently found that when I was in Greece I got 3 days from the battery as I hardly used the phone.
The phone can often get hot, never overheating though. This isn't really a issue as nothing comes from it, however I feel that later on in the phones life it might start to take toll with the phone restarting.
Overall, the Atrix is a great phone and has filled the place of my BlackBerry well. I would suggest it to anyone thinking of buying it.