Hi!
I had installed Avast when it had came to Play Store first time, it had a good impression on me, but also it had some deficiency. So I uninstalled it.
Then today I install it again when I browse AVAST website (I get on the side once time a week approximately) and I see it can be connected to my AVAST account.
(I test it, work great! Anyway the AV! account is one the best thing, so I could keep safe my gf PC, because she is not a tech guru 
)
The second impression is even better! The GUI is still has a good look. I love it so much! And the most of the deficiency is solved.
And why I wrote this? It is not a bug report or something else, I just want to warm up your hearts, that you are doing good stuff, and you doing it right, even a bit more better and Avast will be perfect.
I use Avast Free Antivirus in my PC and now on on my phone. And this products are one of the few which I will buy (I am a student right now) the paid version (Avast mobile don’t have paid version, I like it ) of all my life.
Avast is better right now than lot of paid product. But not the best, but I hope you will keep up the work, and it will be the better. (Multi engine solution?)
And at the end a question:
I live in Hungary, and study in the Óbuda University (it is a IT oriented university). It is possible that I want to work with Antivirus programs. Any chance to that I can work at Avast, without I must moving out of my country?
Because of I really love your attitude to that what you are doing.