Hair extensions are an addiction I just can't shake.  It's been years since I've had them in, but guess who fell off the wagon again?  Throughout my 10+ year career as a beauty writer, I've tried different brands and methods for adding some fullness (and occasional length) to my otherwise super fine hair – bonds, tape ins and clip ins.  At different points in my life, different methods have worked, but the one I keep returning to are Great Lengths tape ins.