Has anyone used Net10 for a cell phone provider?

I'm very low tech here with a super old cell phone. I've wanted to get a smart phone, but the huge cost in monthly bills has prevented me from doing so. I want a smart phone, but don't really need one.

I researched Net10 and am interested in trying it out: http://www.net10wireless.com/#/plans I'm thinking of doing a one month plan just to see how their coverage is, and then switch to the $50 a month for unlimited everything. I am hesitant b/c it seems to good to be true!