It's okay but it messes with adblocking extensions and every other page I open has a stupid popup at the top asking me to save trees with Tero. I already have the extension. Why am I getting this stupid pop up on shopping sites.

The extension is overall a great idea and I am going to keep using it because I find it to have great potential.
On the other hand, despite the posible customization of the new tab itself, which is a nice feature, the lack of customization of the search engine itself of the included search bar makes me think it is still not full developed.
Also I have used it for a while and I haven't seen a single ad on the new tab (I don't use adblock) making the extension not fullfil its purpose.
As I said, I enjoy this idea and I will keep supporting the add-on and my rating will change over time as the extension develops.