I bought the travel sizes at $2.99 each since the 13oz bottles were $7.99 and I wasn't ready to totally invest in the product yet. The first couple of times I used it the next morning I woke up with greasy roots and was pissed because I did read that on the reviews that happened to a lot of people. After watching thesmallthingsblog.com video about having hair feel the same at home after getting a hair cut I learned that if I didn't wash out the conditioner completely that my hair would be nice and soft the next day. It worked! I always feel I need to wash my hair so it is squeaky clean, but it makes sense to leave a little conditioner in it to help with styling for the next day.
I'm still not convinced that I need the bigger bottles, I have shoulder length hair and don't use that much shampoo and conditioner so I think I'll stick to the travel sizes for now and use it a couple times a week, switching between my regular shampoo and conditioner in one.
|Note: These bottles are each 2oz. They look much bigger in the picture than in person|