I had a Xperia Arc S for 2 years (purchased more than 2 times more expensive) full of bugs, slow, have to recharge it every day etc etc. A desolation. Today, I discovered what a true smartphone: easy to use, fast, enjoyable. I was surprised by the good autonomy unlike the Xperia and I said that I have not changed ISP, I still live in one place. Someone in my family has an iPhone that I do not trade against this unit (and not talking about the price!). Finally, the only point I was a little confused when first getting started, it's weight, but quickly got used to it and we must know what we want, the screen is large so you have a good battery. Honestly, no regrets, I bought this camera by chance, just compare various products and I am quite satisfied.
I change my comment to add a negative point that I just discovered: on most smartphones when you want to call via the contacts there are three icons: one for call, one for SMS and one for video calling. This icon does not exist therefore impossible to make a video call. If a caller is trying to call me on video, it has a message like "the other person's phone is not compatible ... simple call."