The show lost lots of credibility for me when they started redesigning the designs of stuff they were trying to Mythbust; like "this design doesn't look safe, so let's weld together 20 more pounds of steel to beef it up...Hey, this myth is busted because the device can't possibly fly". That, and their incessant need to blow stuff up at the end, "just because we can".
The whole show got out of hand, and waaaay off track from where it started.