JohnO,
The difficult part is finding foods with no or very low sugar and maybe learning to read ingredient labels for some.
It is very good to learn though and if you take a step back and look at SB in general it is really just eating healthy. They do cut out things like potatos and corn, however, I think it all depends on your goals.
If you are looking to lose weight you should try to stick to the SB plan as closely as possible.
However, once you make a weight level you can move to a
Low Glycemic diet which will open up a few more things for you to eat (or eat in moderation). You can actually lose quite a bit of weight going on a low glycemic diet as well.
Keep it up it's not JUST about losing weight imo.