Definetly worth playing a few rounds.
The build up is nice, and it doesn't take too long to get to the really challenging part, so I ended up trying 30 or so times. I've gotten al but one of the achievements, and I wish I knew what that was. I would have liked to equip multiple upgrades, but hey, it's your game, you can make it as tough as you want. (I'm just happy I had the laser-proof one. Those things suck.)