The interface! It is so clean, minimalist, even I am going to call it pretty. And well, it is still on Beta, but loved the image translation, the firts time I use it, was surprise how well, good it recognize the text on the picture but like I said, it is on beta still, so it's not perfect, translate for words, not sentences. Translate web sites and when are translate, then you can share them.
Yandex.translate has apps for Ios, Android, and Windows Phone, but only for Ios and Android works offline.
Also like the "read out loud" feacturing, it is real clear, you can understand everything very well. The voice entry, works well too, helps alot to improve the pronunciation. The auto-detected language is simple the best, it changes automatically, you don't need to click to make the change.
The thing is... like the many others translators, that does not translate full sentences, just the separate words, that way then many times, your translations do not have any sense to you, specially if you are still learning, or sometimes is just too much literal, like the other translators. It makes me wonder if all the translators have the same or common database.
Yandex.Translate is easy to use, a very helpful tool for translate in many language, free, has apps versions. You must to try it.
Like with the others translators, we are using Yandex.Translate like a tool to help us to improve and practicing English, Italian, German, Portuguese. Since we have costumers and students that are from countries that speak those languages.