I have one of these and it is amazing. It does a really great job of getting out dander--esp on my lab/beagle mix. Since I started using it on her, I have noticed that she sheds less by a considerable amount. It keeps her top coat soft and silky and really just removes the short dander of the undercoat. It also works great on my spaniel, but I can only use it where he is cut short. It doesn't work that well on his longer hair. I think its well worth it.

Sakari, your best brush for a poodle is a comb!

As long as you're not showing her, the combination of a slicker brush (I like the Four Paws brand slicker) with a good comb through afterwards will keep that coat tangle free. For combs, you'd be better off with 2 types: a greyhound style comb and what's known as a poodle comb. The Greyhound comb has a combination of fine and medium teeth approx. 1" long. The poodle comb has teeth that are usually 2-3" long and spaced farther apart. The greyhound is good on the body and legs, while the Poodle comb is best on ears and topknot. (I think somewhere here in the photo album I posted pictures of some grooming tools, but it was quite a long time ago)
Be sure to part the hair and brush then comb from the skin out, and always maintain a line of skin (line brushing).

I hope Tess' coat is harder than it looks in photos. That is not my favorite type of poodle coat...dense and soft with only a few harsh hairs...it seems to matt easily and the matts are almost impossible to work out with a comb and brush. In my opinion, that kind of coat is best kept short and I'm glad to see you are keeping her that way. Your groomer is doing a beautiful job on her, btw.