It is a beautiful Sony smartphone entry; do not overload the application, for example prefer the original Android browser Chrome rather than taking more phone memory, and only allow for updates as apps that are used really. Under these conditions the smartphone is very fast. The Xperia virtual keyboard takes up too much of the screen when writing in landscape mode, and so I replaced with the new keyboard that Google is free in Google Play. In total the Xperia E works perfectly if we learn to use it well.
However, the mobile started to slow after 10 months of use. So I advise immediately rather buy a Sony Xperia M C1905 Compact NFC Smartphone which is more powerful.