I have Turbo Jam (same instructor as Turbo Fire) and love it. I have the 5 Rockin workouts DVD and have used it for 4 years now. I always get results when I use it consistantly, and it is fun as well. The DVD I have has a 15 minute beginner workout, 20 minute cardio, 20 minute abs, 45 minute cardio and 45 minute toning. I have not tried Turbo Fire but I have heard it is more challenging that Turbo Jam (which is easy enough to do but still a good workout).
I do like Jillian Michael's 30 day shred, it is very challenging and effective and is J. 20 minutes.
I also take a zumba class and I love it. I cannot believe how many calories it burns- I bought a heart rate monitor and zumba burns between 600 and 800 calories per hour. It is such a fun class that I hate to miss it.
If you want to lose weight and have any visible results, though, you will have to start calorie counting/change diet. I work out 5 days a week....zumba twice a week, running 2-3 times a week, jump on the trampoline with my kid 30 min a day (actually great exercise!) yoga etc. I work out a lot but I cannot lose weight or see visible changes unless I change my eating. BTW my friend started P90X 3 months ago (5 days a week) and J. watches her portion sizes (no hardcore dieting) now and she is now visibly changed.