You get two flying 4/4s out of the deal, and the bonus of your creatures gaining indestructible
The downside is youre limited to cards that actually have the printed madness ability, with only a few ways to apply that ability to other cards
Dromar's Charm is a decent example of this providing you with a hard counter spell when you need to protect your board or stop someone from winning the game by providing five life when you're falling behind, or a little -2/-2 to take out a utility creature
In 'Lost in Space' (Allen Panakal), an extraterrestrial is stranded on what we must assume is a moon, with a ringed planet seen in the blue and pink background
Shifting this Peter Pan onto another gets him into play earlier, making it much easier to challenge characters and control the board
By contrast, even the least interesting Commander 2016 deck is currently clocking in close to $100 retail