Ranked in these QuestionsQuestion Ranking
Pro Free and Open source and gets the job done
FOSS and has necessary features to make a great start up page. Highly recommend.
Pro Has a web version
Phones usually don't support extensions. A web version is a godsend, especially since it has a dedicated mobile webpage.
Con Essential features only
This extension features a few but useful features only. But it is a great new tab page nonetheless.
P.S. If you wanna add new features, you can just fork the source code if you are that kinda guy (its FOSS).
Con Limited customization
Widgets can't be customized a lot.