I've just bought one of these....£33 inc P+P from eBay. It's brilliant!! I have 4 dogs including 2 GSDs; one thick medium coated, one finer long coated. All my dogs are used to the Dyson anyway but the slight problem for me was getting them used to the 'air flow' through this tool. However, once over this, they absolutely love it!! It works just as it says. You brush in the direction of the hair growth and after a few strokes let go of the bar and the hair gets sucked up
I have a broken coated JRT whose coat is far too short and fine to use this but he queues up for it....not wanting to miss out....typical terrier
I use it extremely gently on him and it almost sends him to sleep
If your dogs are scared of the Dyson, you'd have to get over that one before you even think about buying this tool otherwise they'll be frightened to death