Google Translate?

Can anyone vouch for the accuracy and ease of this app?

Will be traveling to China, s Korea, and Japan and I don't speak any of these languages. Google translate appears to cover the bases I'm looking for....no need for wifi or cell signal, uses voice to text, will work with the camera to translate

I downloaded the 3 languages I need and put my phone in airplane mode and it does still work, so that's a plus. Has anyone uses these with success? Used and had issues? Actually speak one/all of these languages and can vouch for the accuracy?

Thanks

English is known to most of the younger generation and they are always looking to practice with a native speaker. :)

Google Translate is so-so with Western Languages, but not very good with Asian ones.

It can translate individual words reasonably well in Asia, but falls down with sentences and complex grammar.

There are several other similar programs that work far better, for example Babelfish.