My go lower packs did arrive, I'm on day 3 and I'm doing okay. Did leap on the scales this morning (which I really shouldn't have, but anyway) and I'm 6lbs down - YAY! I know it's water weight and physically impossible to lose 6lbs of fat in that time but i'm still happy.
Also, the diet is lovely! You are allowed between 40-60g carbs (I've been happily sticking to the lower end), which isn't as restrictive at atkins, and it doesn't feel overwhelmingly meat and fat, which is what happened the first time I tried Atkins (my fault - I wasn't any good at writing more balanced menus).
But...before I rave too much, it is very pricey and also for me very early days. The problem I had with low carbing before was not getting into ketosis, which didn't feel too bad, but that I just didn't get enough energy, even 2 weeks into the diet, which surprised me. On Jim's advice (and because I've paid for 28 days of Go Lower), I'm going to give it the full month before making any judgements about it's long term doability.
Anyway, though, so far so good, thank you for asking!