Well not necessarily... most have added sugar in them that more than voids the lower cals or fat. I used to buy the light versions of cookies, diet stuff you know, and they didn't do me one bit of good.
Advice? Have you ever heard of guiltless gourmet? Oh boy oh boy they have some good eatins'. Like their bananas foster cake yummmo! I get those and allow myself one per week for each week I stay on plan - my reward. And man they are a reward and a half; much better than some 1000 cal dessert right. You feel like you're getting a reward, but it's still good for you! Go figure!
Me personally, I don't buy any of the diet foods, like the cookies, or crackers, etc. If I'm hungry, I have a protein shake, or fresh fruit, or yogurt (the whipped chocolate yogurt - put it in the freezer and then eat topped with fresh sliced strawberries wow so delish!) - you get the drill. I just couldn't control myself with those things, so I put myself in diet boot camp LOL; I took a big hefty trash bag and went through my kitchen and tossed everything that wasn't totally awesome for my plan. We all have our own solutions and what works for us, but with me my problem was overeating, so my logic was, if I don't have anything in the house I can gain weight from, I can eat a little more in quantity and not gain weight from a slip up. You'd be surprised by how creative you can get with sweets if your rule is not to bring any of that stuff in the house. Another idea? Okay....get some fresh pears, cut in half and seed them. Place on a baking sheet and drizzle with a little honey and sprinkle on some ginger and cinnamon, and bake at 250 til soft. Dollop some fat free whipped topping, and you're in heaven. I also grill bananas in the skin on my George Foreman grill til the banana is soft inside; peel it, and put it over some fat free frozen yogurt, and drizzle some sugar free chocolate syrup on top.
So good. Hope this helps!!!!