I use miracle noodles and they are ok. not great, not bad, but ok.
they don't absorb any flavor or moisture, and there is a knack to preparing them, but overall I like them well enough.
here's the secret to preparing them--rinse several times in cold water, yes they stink when you open the package but don't let that scare you off! rinse and repeat, cook as directed. after draining the noodles, put them back into the hot pot and gently cook the excess moisture off over a medium flame. cooking that moisture off really helps the texture to be like what we expect from al dente wheat pasta.
yesterday I made tuna noodle salad with miracle noodle ziti that was pretty good. I am curious to try it today and see if the noodles picked up any flavor after sitting with the tuna all night.
spaghetti squash is also good and a bit different. I keep meaning to try zucchini noodles but haven't gotten around to it yet.