I picked up a sachet of this when out and about because my hair was in need of a bit of help (nothing new there then). As soon as I opened it I was greeted my the most delicious scent of coconut and chocolate (I'm pretty sure that's what I can smell anyway) and I fell in love. I didn't even care if it worked or not because if I could have my hair smelling like this everyday, I so would.
This twice a week conditioner has shea butter in and says it "helps to gently mend all the cracks, smoothes the hair cuticles and adds supercharged shine." You leave it for three minutes whilst in the shower, or if you're in the bath you can leave it on your hair, wrapped in a towel for as long as your heart desires. After you've left it on and you rinse your hair it does feel really smooth. It makes brushing your hair after a doddle and leaves your hair smelling great. As far as long lasting smoothness and silkiness goes I haven't noticed a massive difference, but then I never seem to notice much of a difference after having used a mask compared to any normal conditioner, but I feel like it's better for my hair!
I would say the shine factor is true, my hair does look pretty darn shiny after using this, which I do
about twice a week. Also, I find that it's quite a lightweight mask, so would be alright for people with fine hair who are maybe a bit scared of using an intense conditioning treatment. I actually picked mine up from ASDA when I was out and about and I think I got it for something ridiculous like £3 on offer - what a bargain! If you're looking for a good hair mask that's not too expensive I would say go and pick up a sachet and give it a try, you can't really go wrong for £3!