I honestly would not recommend following a very low carb diet plan for life - including NHE. But I also don't recommend constantly trying to lose weight. If you're trying to lose fat, and low carb diets don't wipe you out, then following a low carb diet to achieve that goal is acceptable. However, at a point you should stop trying to lose fat and just try to maintain weight/body composition.
When maintaining, you should be able to increase your carbs - especially your fibrous carbs - and still be able to maintain weight. On a maintenance plan, you should be eating some fruit, lots of veggies, ideally some dairy, and clean complex carbs. If you start putting on too much fat, you can always drop the complex/starchy carbs for a while until you get back to your maintenance weight.
The debatable issue is whether or not to do the NHE bodybuilding plan or Anabolic diet for building muscle. I have been, since I seem to put on muscle faster on this type of diet. However, I'm also going through rigid diet cycles where I'm losing muscle, then I try to put it back on (and add some) before I have to go back into a cutting cycle. If you're not competing, I don't think you have the same issues. Plus, other women on the boards are successfully using more moderate carb intake during their building cycles (Spatts and MS, to name two). Their carb intake is clean though - that's the difference.
When I've gotten the competing bug out of my system, I plan to go back to a moderate carb intake approach. Of course, who knows when that will be.