oh im the 1st voter WOOHOO

i don't use it - i think that although there can be a benefit to those types of products - that i have the fear that i'll ruin my sheets. besides, my hair seems to look ok with the products that i currently use.

I colour my hair red (Julianne Moore red) and I have to use colour-enhancing products to compensate for the fading that happens every time I wash my hair. Unfortunately red is the most difficult colour to maintain as it fades when you wash your hair no matter what.
I have tried all kinds of colour-protection shampoos and conditioners but nothing worked, so I had to use colour-depositing products. Now I am pretty happy with the results although the colour still fades by the end of week 4/5 when I go for a retouch. And I still have to colour both roots and ends every time (albeit, the ends only for much less time) otherwise I'd have two toned hair. Plus, colour-enhancing products give one more benefit: roots (my natural colour is light ash brown) do not stand out that much in the 3rd or 4th week.

BTW I never had stains in my sheets or pillows. Maybe you do when you use no-rinse products, but I've never used them.