I like the snaffle and use the mildest for both of my horses, I works well with the 1 rein stop and it does'nt hurt or scare them if they spook and lunge agianst the bit.
We ride our horses bitless (They are older). There is a chain you can buy and put over the nose for emergencies and correction. I rarely use it for correction and have been fortunate to not have an emergency to date.
All our stallions are ridden in a snaffle in show ring and on the trail.... I agree wholeheartedly - it's the training not the bit.