As some of you may well know I have a long coated breed my beloved beardies.... I have spent a small fortune on shampoo/conditioners over the years...from Doreen Paige, plush puppy, wahl, chris christensen, groomers I could go on....WELL... I have finally found the shampoos that I think are marvelous for my girls coats...and it is  dah ...dah.. Redcape professional 'Requal' it is  very   expensive in comparison, as you use 2 shampoos together with a conditioner , I have to say I am sooooo.. impressed.
I also found it very easy to do as you dont wet the dog , you mix the shampoos together with the conditioner and add a litre of water then sponge it onto the coat, leave for a few minutes then rinse off.
they have different products depending on the coat type and condition of the coat , they have treatments for inbetween shampoos for say pre-dog shows , or problem skins, white coated breeds etc

Think I may have mentioned product before but can see such an improvement I thought I would share. :)

I've always had a very high opinion of their products, I might try them again if you are so impressed--I bought a Requal spray and my dog nearly hit the roof when I treated him to a blast of de-tangler so I gave it away. We're using DP or Quistel.

Snap, I too have the whole range and have recently discovered Requal. My boy was going through the teenage coat change and I was despairing that he would ever get his lovely coat back. I have been using these products and I too highly reccomend them.