I love, love, love these things. Other companies have started to make them such as Downy Unstopables, Gain Fireworks and Snuggle Scent Boosters. Strangely enough though I hate Purex detergent I love these. The freshness lasts up to 12 weeks and makes your closet and dresser drawers smell fantastic. Tip on these: Wait until CVS has a buy one get 2 free on Purex. This is how I stock up and is even better if you can combine it with a coupon.
I love Purex Crystals. They smell fantastic. Even though other companies have made imitations, Purex Crystals were the originals and the only ones I buy. Some people who are sensitive to scent feel that they have too strong of an aroma, but I think that's what makes them so effective in freshening laundry.
