It pairs well with the matching shampoo, but I've also used it with less expensive shampoo with similar results. It's very concentrated and has a lovely fragrance. It really deep conditions my hair, too!
One word of caution: the liquid is rather thin. Be careful when dispensing it. But don't let it fool you -- it's definitely the best conditioner I've ever used! Worth. Every. Penny. (It also lasts forever!)