Went with the Core, and really hoping to least a good 20 pounds. With frequent snacks between meals, as well as plenty of fluids, you are eating pretty much whenever you feel hungry. Maintaining a healthy weight took on new importance after starting a family. Drinking over ounces and eating tons of leafy greens. Losing 20 pounds is definitely doable with Nutrisystem, but I would budget at least two months. I was only eating the provided meals the first two weeks usually around only calories per day obviously that was unhealthy, so i added in a few snacks to put me right around calories per day.
The weight loss with Top Secret Nutrition was eh, average, but again, if you have a sensitive stomach, it's a pretty decent trade off. I would say though, still, that this was probably the third most effective brand I've tried with regards to actual number of pounds lost. The most was with a brand called LipoVida -- but I literally wanted to vomit ever day that I took them. Plus I heard that 80 HCA wasn't actually legal or possible (I'm not an attorney or a doctorscientist, so don't quote me on that - just passing along what I heard) The best so far for actual weight loss for me plus no nausea has been Pure GCE (I ordered mine through the site 'bestgarciniacambogiapills' dot com.
Again, if you don't mind the jitters and all that jazz, it may be worth your time to check out the LipoVida brand.