Nutrisystem

I did it for quite some time when it first came out. Some of the foods were actually decent. But it is extremely expensive for the tiny (calorie dense) portions of, for the most part, mostly carb heavy meals(ravioli, tortellini, small amounts of meat with sugar based sweet and sour sauces and rice). I see where you're coming from with portion control, so I would consider doing your own made ahead meals. Meal prep takes a little time but it can be as quick or as time consuming as you want it to be. I do: Frozen Stir fry veggies and chicken with some premade sauce(use less, Just enough for flavor, to cut cals). If you still want to incorporate pasta you can precook pasta or raviolis and preportion them with sauce and some veggies(add ground turkey to sauce for protein if you want). Its insane how much they were charging for 2 slightly large raviolis in some sauce, you could make probably 4+meals for the price of 1. The recipe builder in this app has been my best friend!
Ooor you could do both, NS and making your own. Just beware that much of the food is pretty high in sodium which will make water weight stay put a bit more. I admit their sweet treats are nice to have since they are pre-portioned, BUT they tend to all be pretty high in the sugar alcohols which can ... make you run to the bathroom or at the very least cause some excess gas usually.
Its up to you ultimately, if you decide to do it try to have it be a stepping stone to a longer plan, that's what most people here will say "are you going to do NS forever?, Etc".
Also I didn't really like that for most/all of the entrees they don't come with any kind of veggie, so I always had to kind of finish them up by adding things. You could eat them without veggies but they wouldn't be as filling that way.
If you want to add me or look at my diary (public) I do meal prep for basically every week day's lunch.
Good luck and do what works for YOU!

My problem would be I have this box of nasty tasting food. Am I going to eat that food or eat something that actually tastes good instead? After a day or two of the nasty food it just isn't going to happen and I'm going to abandon the Nutrisystem food and eat something that actually tastes good and since I didn't plan for it I'll probably eat something with too many calories. A much better plan would be to plan some good tasty food choices that fit my calories and nutrition goals and skip the boxed food, unless you don't mind eating food that doesn't taste good.

I totally get the portion control thing! I caution that if salt is an issue that anything "boxed" is probably not a good idea because what typically happens is that they replace "salt" used for preserving with a chemical crap storm that will cause adverse effects also.
I totally struggle with portion control but recently found these really great divided tupperware dishes that have lids. I use them for my main meals each day to help me, I know that if the lid fits and the portion fits..I'm GOOD, and the VEGGY goes in the big slot.
I do hope that you find good suggestions and positive motivation here, sometimes people get a bit "passionate".

My BIL used them for a while, because he was used to drive-thrus and convenience food. He learned pretty quickly that he could feed himself more cheaply with other things, bars and such that were in the box can be had for much on the regular grocery aisle.