What I love about light hand, is that is offers to the horse a free way to learn how to carry himself in a balance and correct manner, but his head is not tied down like it would be with other attachments.
I found it actually reminds me where my hands should be, with the gentle pull action it offers, it's fantastic for heavy handed riders, as it just reminds you, with that gentle flex down the rein to lift your hands up etc. On the horse, because I was more conscious of having my hands in correct position, I in turn rode better resulting in him carrying himself in a much better outline, so all in all I really like this aid, which is encouraging and beneficial and I think could be extremely good for young horses. I love the fact kinder and more comfortable riding aids like this are now on the market, it's well overdue!