I purchased this product because I had joined a gym, read that free weights were the best way to train, but had absolutely no idea where to start. I was looking to enhance my workout at the gym without paying for a trainer.
With these cards, I definitely got a lot of benefit for the price. The box says there are 50 exercises. I was concerned that there would be like 30 with a bunch of variations to make it 50. This is not the case. If you include variations, there are 78 exercises! If you are concerned about equipment, there are several that don't require any equipment, but you'll definitely want dumbbells - or at least a serviceable substitute such as soup cans or bottles of water. With that, you will be able so do most of the exercises. Other than that, a balance ball would probably be the next most important, but a few other things make an appearance: bench, step, resistance bands, and maybe a few others. There are plenty of individual exercises to get you started with toning your whole body.
The circuit training cards are kind of neat, but I find them a bit tricky to make practical use of at the gym. They do, however, give a great workout plan to try, and could be fun to do if you have a workout buddy to help keep you from taking constant breaks to check the cards.
The exercises are great, and the box gives you enough information so that you know how to get started and make the most out of cards. If you are looking for some exercises to get you started at home, or a how-to that you can reference while at the gym, this is a really great buy and I doubt you will be disappointed.