I use these most days! They've been a godsend while I've been on a VLCD and I plan to continue eating them now I'm in maintenance. I don't see the point in 'wasting' roughly 300 calories on real pasta or noodles when they're just a filler really.
I rinse mine thoroughly before using, drain them and then I microwave them for about 1.5 mins (for half the pack) I find that after that I'm able to drain off even more water so they don't make my meal too sloppy/watery.
The only variety I don't like is the 'penne' pasta from Slim Pasta....that really does taste rubbery to me, and I think they look a bit weird because they're kind of translucent rather than cream in colour like normal pasta.
Each to their own I suppose though!