I had the Spock vs Snake model and the exploration set. I was profoundly disappointed with the exploration set - it was almost identical to the Remco Star Trek belt with comm, phaser and tricorder...
I went through 12---*12* ENTERPRISE kits, and 7 Klingon!
In fact, I still have a small scar on my finger from burning plastic, that I received giving one of the D-7s 'battle damage' with a lighter. Ah, memories....