Aashley, they are fun. I find they send stuff I'd never buy. The Fat Quarter ones great, all high end fabrics in one color theme is the one I've signed into and while I'd never seek some of these colors, I find they have come in handy. Just the right color for x, or this applique needs x and they were there.
SusieQ I agree, the monthly boxes aren't my cup of tea. I couldn't even do the thread ones but I do love the fabric. I've been through several I didn't like.
Never heard of a few of these places so I've got some searching to do. Thanks everyone.