Can I really achieve weight loss by replacing meals with slim fast?

I found Slim Fast to be very unsatisfying- in fact, I drank the shakes merely like I would a smoothie (and I found home-made smoothies to be more satisfying) and never as its own meal. The idea of most diets is to simply deprive your body of food, in turn, depriving your body of nutrients. Usually, a diet like Slim Fast only works temporarily, then the weight comes back when a normal diet is started again.
Yes, you most certainly can lose weight in the short run with a product like Slim Fast. But I strongly suggest researching the human body and it's nutritional needs, then comparing it to current-day fad diets.
Honestly, you'd save more money eating sensibly with vegetables and fruit and lean meats than buying into a weight-loss product, especially if you're not the type to work out.

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They are high in sugar, contain high fructose cornsyrup, and hardly any protein, go get some whey protein at walmart (aprox $15/2lb tub) drink with skim milk and frozen blueberries, add a pasket of splenda if you like, it will be forty times healthier for you.
The Optima ones are slightly less horrible than the original ones but they still provide more sugar than protein = not good.

I would check the ingredients. If you want to lose weight that way I use a product called Isagenix. it is mainly organic and all natural and I lost 11 lbs in 13 days and counting. I feel GREAT
www.carolynziel.isagenix.com

The way it works it this : eat sensible low cal meals during the day and when you get hungry you have those for a nutritious snack, because its fortified with vitamins .
Edit : Your question was "is it a good way to drink slim fast as a meal replacement drink ? (that answer is no)
There is more sugar in other products that aren't including the vitamins that slim fast has .
The idea is to consume more protein and less fat and sugar . Slim fast has sugar but not as much as drinking a regular shake with all sugar and zero vitamins..

This is just a starvation plan. You'll be so hungry in a day or 2 that'll you have to break the diet and eat. Starving isn't a life long eating plan so it's doomed to failure from the start.