I have the Mars 2 400, 700 and 900, and I would say that it is a very good option if you don't want to spend to much. The node spacing using the Mars 2 is insane. Just note that it doesn't have a large footprint, so you might want to invest in the 700 if you're growing more than one plants for maximum results. I've tried every LED company under the sun and I'm sticking with Mars if I were you.