Simple but effective rule set

Have to agree here.. pinball "deep" sets are becoming like chewing through War & Peace.. its is actually nice to get to the end of a game and be rewarded without losing a day or two in the process.
As always though.. its one of those things that's achievable once in a blue moon and "almost" on many occasions.
Once components are chosen the balance of those to make a game effective is a fine line... the ever " so close but no cigar" is a difficult balance to make.. not many machines actually have it and multiple toys don't make a classic players game, in fact, few well chosen aspects properly placed make a tough but very rewarding game.
One of my favourites - WMS APOLLO.. not too much there, but classic design and just elusive enough to tempt you for more plays