They're intense workouts but pretty good. The 30 Day Shred is a half hour video with strength training, cardio and abs. I used it when I first started getting back into shape and it's a great one for that.
No More Trouble Zones is a thorough, full body strength training video. It has no cardio though so if you need cardio, you'll need to do the cardio video separately. I, personally, got bored with Banish Fat Boost Metabolism and started running instead but there's nothing wrong with the video.
Jillian is very minimalistic about equipment in these videos so they're great for exercising inexpensively and they work well in small spaces.
My general opinion about workout videos is that, unless they contain unsafe moves, they are not gimmicks and will work as long as you do.
Weight at delivery: 236
Starting weight: 220
Goal 1: 180 (pre-pregnancy weight)
Goal 2: 164 (weight I maintained for a long stretch)
Goal 3: 150 (lowest adult weight)