yes I use it. works well for the show ring, would I use it on my dogs staying in the house....most likely not. I used it more when noah had his wild puppy coat and his fur on his hips was at a weird grow-out phase (IE I dont want to lie flat I want to stand straight up!). Worked well to keep it looking nice and orderly! Cant really comment about build up because I would only use it once before ring time so it wasnt like I was using enough of it to have a buildup.
Jennifer only used it the one time, but the one time she did use coat dressing I really liked it.
So I can't really comment on regular usage either.There's a lot of products that if you use a lot they cause build up. I LOVE the Plush Puppy Puffy Dog. I wouldn't use it every day though. It's great to use on a sheltie ruff. It makes Smudge feel like a teddy bear.

I also like to use the knock off of Paul Mitchell's Tea Tree Oil shampoo (found at Sally's Beauty Supply) for after heavy trimming and raking (to cleanse the skin of impurities from the metal tools being used), or to help the dog's skin if they have skin issues. It's a bit strong so mixing some with water will help (not sure what ratio to use, I just eyeball it). And it also helps your wallet, too!