I've made low carb ice cream in my ice cream maker and, while it wasn't bad, it just wasn't like the "real thing". But then I made regular Vanilla Supreme ice cream and IT wasn't like the "real thing" either. I think it's missing the additives that the commercial makers put in to make it creamy smooth instead of like frozen cream. Does that make sense?
I will never trust any bread that calls itself low carb. Generally they taste lousy. Personally I can't stand soy flour. A person might just as well eat drywall joint filler.
I have made Mock Mashed Potatoes using cauliflower and I have to say it was pretty good. The secret is in cooking every single vitamin right out of them, draining them until they are just a pulp and adding lots of seasonings and butter. Not bad at all.
I've tried spaghetti squash pretending it was real spaghetti. Well, I was not fooled. It's just stringy squash. Ruth has a recipe using zucchini cut into long shreds that she says is more like real pasta. I'm not sure I believe her though.
One of the few recipes that really does turn out better than the original is low carb cheesecake. I posted a recipe that is to die for. The next time I make it, though, I will cut it immediately into small wedges and freeze them. Even low carb can be HIGH carb if you eat the whole thing within a few days.
For the most part I stick with meat and low carb veggies and really don't try too many commercial products. I've been fooled too many times.