I actually bought these products last summer, but i just recently repurchased them. I tried the nivea's crystalgloss line this last winter, but it made my hair really dry.
I got the Dumb Blonde shampoo and reconstructor. They were about 40 euros together, which is quite much for shampoo and conditioner but it's well worth it.
The bottle says it will moisture your hair, adds shine, feeds it with provitamin B-5 and adjusts the pH and they're absolutely right! I love the smell of it too, it's like a mix of kiwi and bubblegum and it's super addictive. I really think it's the best shampoo i ever had, you dont need much of it (just 1 pump will do, it foams like crazy) but i always wash my hair twice to make sure it's really clean.
I also tried the control freak shampoo, but i didn't like it as much as the dumb blonde one. It made my hair dry and they felt really weird after i washed it so i don't recommend it.
You can use this one as a hair mask or as a conditioner. It's an awesome product, it makes your hair so soft and shiny and they look really healthy (even my hair and i haven't had a haircut since october! oops) The only downside is that you need to leave it on for about 5-10 minutes to make it work, which is a long time in the morning when you're getting ready for school or work.
Next on my list is a hairstylingproduct to create some volume, since my hair is really thin and makes weird curls when i dry them naturally. Still haven't decided what i should get because they got quite a big range (;