[Nsight7]

I would say that cash games are the best training ground for learning to play poker as a general rule. If you have a decent bankroll and you are willing to lose a little to learn the game, this is the way to go. The variance in SnGs will leave you wondering if you really know the game at all. The fact that your odds equal your equity in cash games will help you assess more quickly if what you are doing is playing winning poker. Plus you get to learn the ins-and-outs of preflop and postflop play (if you want to concentrate on preflop play, you can shortstack).

Basically, it is like this, good cash-game players don't have much issue beating SnGs, but good SnG players have much more difficulty beating cash games. So go to the proper training grounds if you want to learn poker. If you just want to earn money with a rather simple form of poker with a pretty well-defined mathematical strategy, go for SnGs.