Despite a terrible first season, which I was only able to suffer through 3 episodes of, I think this show is a solid science/engineering show.
It's similar to Mythbusters, but they do things on a much grander scale and on a much larger budget. Because of this, they get bigger/more explosions, but less of the practical (cost, time) engineering side. However, it's still quite enjoyable because of the interesting challenges they take on.
I think the second season is a great improvement over the first, so don't judge the show too quickly (or just avoid the first season). It took Mythbusters a few season to really perfect their show as well. The new team members, new narrator, and fewer scripted lines on Season 2 are what makes me give it a solid 7.5. It would be higher if they explained their design decisions and methodology more.