Google Assistant is one of the most successful projects developed by Google. Assistant works very well and it's available on many Google's devices including Pixel phones and Google Home. Basing on opinion of some people the only disadvantage of this project is that Google Assistant doesn't work in many languages, but it should change in the nearest future.
On Twitter appeared map showed by Google on the special event which shows that in 2018 we should expect Google Assistant's expansion to the new countries all around the world including Italy, Saudi Arabia, Russia, Sweden, the Netherlands and Poland. Total number of countries where Google Assistant will be available will expand to 52 (38 new countries) and assistant will work in new 17 languages.