Google now launcher is a very good app.I think It is very useful app it gives a column to search a app that is best feature I like in it and its design is also very good and it is a simple app it does not add anything from its side that is also a very good feature in the app.
It is very reliable it does not use so much of ram also. It manages all the app in abcd form that is also very good. It has no bugs at all. It is very very very good app for free you should go for it.