The field of in-wash scent booster options grows even more crowded with the recent addition of P&G's Bounce Bursts.
Procter and Gamble provided me with a sample bottle of Bounce Bursts, along with a box of Bounce Outdoor Fresh dryer sheets, in return for an honest review.
I use a standard top-loading washer and liquid or powder detergent, along with the Bounce Outdoor Fresh dryer sheets for my fabric softener. I add liquid chlorine bleach in my white loads.
In-wash scent boosters add a pleasant aroma to your laundry that lasts far longer than with liquid fabric softener. Such products don't soften or inhibit static; they only add a nice scent. If you use an in-wash scent booster, you'll still need to use fabric softener, such as Bounce dryer sheets.
Scent boosters also don't cover up unwanted smells. If your laundry detergent doesn't remove odors from body oils or cologne, and you already add detergent to the washer before adding clothes, you may need to use a bit more detergent or try a different product.