One website I like to visit is www.freestuffheadquarters.com. They put together lists of places giving out free samples that you can try. One sample that I received through there and recently tried was a Purex Complete 3-in-1 Laundry Sheet. If you've never heard of this, what it is is a sheet that goes with your clothes in the washer as a laundry detergent and transfers with your clothes to the dryer as a fabric softener and anti-static.
I tested this product out on some new sheets that we bought. While it did its job as both a laundry detergent and a fabric softener/anti-static, and smelled really good, it is not something I would likely use all the time. For one, it cannot be used on any children's pajamas or other flame resistant fabrics and since we have a small child, almost every load we do has some sort of this material in it. And the other reason I wouldn't use it frequently (and this is silly) is because you have to start the water first, then add the sheet, and then add your clothes. This is completely backwards of how I do laundry! It definitely required some brain power on my part to do this.
That being said, I do think it's a good product, especially for those without small children. It is definitely more convenient to carry a lightweight sheet than a big container of liquid detergent. And more economical to buy one product than separate laundry detergent and dryer sheets. It would be ideal for traveling as well.
You can visit www.purex.com for more information or pick up a package at most local supermarkets.