Gliders don't actually respond to their name but rather how you talk to them, but this is based solely on your bond with one another.
I've talked to two people who have used the bonding potion. One swears by it and the other (and there was video) didn't work AT ALL.
I'd say for the cost and the 50/50 reviews, I'd suggest saving your money and going the 'old fashioned' way of bonding with your baby.
I disagree with the "responding to their name" as I have seen first hand that a glider can actually learn the sound of their name as distinct form other sounds you make while talking, as well as a few other words.
I do agree with you that the "old fashioned" way of bonding is best.
Trust is of the utmost importance in bonding. They need to trust you. one way to build that trust is through consistency. Do the same thing every time and get them on a routine and they know what to expect, that is trust. Handling them gently builds trust. and leaving them alone when they really want to does as well. Mutual respect is important.
Just my opinions
lookie here and tell me what ya think
http://jillmariestuff.webs.com/bondingandtraining.htm