One of my friends was COMPLAINING about un-sewing. I looked at her seam ripper, asked "how old is it?" She said "it's the one that came with the sewing machine" (sewing machine is probable 20 yrs old). I MAKE HER buy a new seam ripper. Then she is saying "OMG, OMG this is so much easier".
About the 'Lighted' seam rippers. IMHO not worth the money. The blade area is to thick and not to sharp. Light idea is great, but.... I will stick to my little white clover.