This is an excert from a pm convo ive had with crazyman,
The problem with them is that you start to rely on lookign at what you are doing instead of feeling what you are doing, the slightest problem and you look at the side at whats wrong, they hold you up and limit your ability,
Get a cheap cylinder lock and repin it to 2 pins then 3 then 4 and so on, this is the best way to learn and if you follow the exorcise as well you will soon be picking,
I thought it prdent to also post it here to further clarify my comment to anyone else reading this,