I have been doing the p90x3 workout videos for 3 weeks. I started dieting 5 weeks ago. I am down 10 pounds. Can probably afford to lose another 25 pounds. Chiropractor has been on me to stop with the weights and do this. He says its healthier. The newest ones are only 30 minutes long (but there are plans for doubles). You wont burn as much as you will in 30 minutes as you do with the originals which are 1-1.5 hours. However, its harder to make an excuse if its just 30 minutes.
dont like exercise, but this is a good healthy full body workout with lots of core. Just buy the base pack for $120. You can get the rest of the equipment cheaper at a sporting goods store. The pull up bar they use is one that can hang over a door frame. I was not sure it would hold, but it does. They exist at the store. I also have an assist which is a band for my foot since I can't do alot of pullups. Few women can do pullups. So if its for your girlfriend save your money. They show how to modify so you can use bands on a door hinge. There is an intro video than each video has modifications. They also say 5 to 50 pounds dumb bells. Unless you are ripped you won't approach 50 pounds. 5 to 20 pounds is fine for most women. I have up to 30 pounds and have not used them yet (but just starting and have not done all the videos)
just follow the plan they have. Its 13 weeks. Pop the video in and do what the guy says. There is a 12 minute warm up video they recommend. Its very good , but I often don't want to be bothered and just need to get done and get to work. There diet plan is a pain in the ass. Use it as a guide for how many calories and what to eat. Don't count the exact protein to carb unless you really want to. If you have not worked out or dieted, doing this will make you quit since its a pain in the ass.
Videos: Don't kill yourself even though they tell you to bring it. Its a 6 day/week workout. You dont want to be too sore the next day. Will take time to get used to it, but when you do they switch to new videos which get harder. Don't skip a day. Just do it even if you can't do as much due to soreness. If you skip one day you will skip 10. Make it part of your routine.
Id also find ways to be more active. Move around. Don't sit and play video games on weekends. This burns calories. Not tons and tons, but its part of it. Find a reason to go outside.