I, too, have long hair. I ran out yesterday and bought some Borax after reading all of the comments here regarding its use. I'll have to get really brave before I think about ingesting it though! I tried washing my hair in two quarts of warm water with two Tablespoons of Borax. I do give it credit for detangling my hair. Brushing it out wet has always been a chore. Borax simplified that! However, the end result didn't impress me. My hair seemed heavy and wouldn't move. It appeared matted down after dry. I think adding a tiny bit of shampoo will work for me. I am going to try bathing in it for all of the noted benefits, but I truly am the type that needs some shampoo of some sort.
Maybe I'll try adding a bit to some Baby Shampoo. I love this website!