I have several of the Beachbody products and like them all. I don't think you can go wrong with a Beachbody DVD set. You will get the results you want with Beachbody...as long as you Keep Pressing Play (you will hear that alot if you buy any Beachbody products).
I own Power 90 and do it all the time (although I do mainly the strength sections - called 'Circuit 1-2' and 'Circuit 3-4' and Ab Ripper - because I run a lot and count that as my cardio). I really like Tony Horton and plan to get P90X one day as well. By all accounts among the people I post with on a fitness site I am a member of, it is an effective program that yields the results - it is hard, but effective. Still, even though it is hard, you can do the alternative moves and get through it if you are in reasonable shape. And IMO it is better to buy a program that is too hard and do alternative moves and 'grow into' the fully monty than to buy a program that is too easy.
The next Beachbody product I will buy will probably be ChaLean Extreme or P90X. I might do ChaLean first...but P90X is in my future. And if I get in REALLY good shape, I might try Insanity.
I have not done 10-Minute Trainer so I can't speak about that. Still, I can tell you that Power 90 can be done by a beginner. It is getting to the place where it is too easy for me...but I have been doing the strength sections a couple of times a week since early February and run about 20 miles a week, do the elliptical, and do some spinning.
If you have more questions about Beachbody, I can try to help. I own Power 90, Slim in 6 (which I love - Debbie Siebers may look really sweet, but don't let that fool you - she kicks your ass too!), Turbo Jam and Hip Hop Abs. And like I said, ChaLean Extreme and P90X are both in my future. I will be ordering one of the two of them within the next couple of weeks, in fact, as a 'reward' for reaching one of my fitness goals.
And by the way, you can look at all of these products in great detail on the Beachbody website:
http://www.beachbody.com/jump.do?itemType=HOME_PAGE
Beachbody also has all of their infomercials and such on YouTube so you can look at them all - just type in "Beachbody" and their 'official' YouTube page will come up so you can see many of their programs. You can also see testimonials from users on their YouTube page....and those might be worth a look as well, because not everyone who purchases a Beachbody product is in decent shape when they start out. They will tell you how they did with the program as a rank beginner.
The bottom line for all Beachbody products is that these programs are not for people who lack commitment. If you want to get in shape, these products WILL get you there. But you have to commit to Keep Pressing Play, and be willing to sweat, and sweat alot. Because Tony (Power 90, P90X), Debbie (Slim in 6), Chalene (Turbo Jam, ChaLEAN Extreme) and Shaun T (Hip Hop Abs, Insanity) do not mess around. These guys - ALL of them, are hard-core.
You wanna get in kick-ass good shape, Beachbody is for you. But if you want to buy a program that is easy and that you can do right now in full, before you even start...Beachbody is not the place to look.
Myself? I own many fitness DVDs...but if I had it to do again, I'd buy Beachbody sets almost exclusively (I'd also buy Jillian Michaels DVDs - her workouts are hard-core too). Beachbody is expensive...but if you do the programs (or do as much as you can and not give up) you will get results - that much is certain.