The intent of this book is refreshing in that it considers that gluten intolerance and carb sensitivity may go hand in hand and doesn't just assume one or the other. So many books focus on the gluten-free aspect while piling on the sweeteners--creating the age-old fallacy of mixing up the idea of "natural" with the idea of "healthy." Lots of books exist for those who don't want to eat gluten but have no obvious problems with carbs, so the authors using stevia or other sweeteners can't be considered a valid complaint for this book, which seeks to be different and take into consideration another subset of the population. The authors even acknowledge that just because certain foods have a particular carb count or GI doesn't mean they affect everyone the same way and that personal levels of tolerance must be acknowledged by the person making/eating these desserts and breads themselves.
These recipes are not for those short on budget, time, patience, or accessibility to ingredients. The alternative flours and the processes involved to make these breads, cakes, and cookies are labor intensive and the ingredients expensive. In some cases, if you can't get ingredients because suppliers do not recognize any country they, in their narrow view of the "civilized" world, cannot easily find on a map, such as xanthan gum, you are out of luck for some recipes. Finally, it can only be surmised the mess you are left with after you've ground, whipped, mixed, sprayed, dolloped, and baked.
It isn't the authors' faults that they do not control the laws of chemistry and that these recipes take some effort, planning, and outlay of expense. Probably they're for people who want to occasionally make a pastry-like treat but who still have the surplus finances to make mistakes with the somewhat precious ingredients and start over with a botched initial try. People who have discovered that simple eating is the most convenient way to appeal to both their sensitivity to gluten and their sensitivity to carbohydrates, including sugar in all its forms (honey included--just because it's in this so-called "natural" column doesn't mean it doesn't have the same health effects as sugar, and it doesn't mean that sugar substitutes such as stevia an erythritol are automatically unhealthy--totally false dichotomy here), may balk at diving into producing these beasts of recipes, as glorious as they appear to taste.