Your impression of CI3 over others?

I have tried Laravel(this is not PHP for me), FuelPHP(I like this one too), Phalcon(this was fun), Yii, Symfony and countless more but CodeIgniter is the best, simple & fast, easy to extend and you can do one thing more than 10 ways
Has a good set of libraries and tons of tutorials and scripts online
And the documentation is more then good

With CodeIgniter even the sky is not the limit