I have purchased many bags of scraps from Nancy's and the quality was always very good. Much better than Joann's, but that is just my opinion. I don't know if it is me getting pickier with my fabric, or if this is really happening, but it seems to me a lot of what I buy at Joann's is getting thinner and thinner.
I would go for it.
ps: it's a fun little shop, too. Love the fact they always give me a free machine needle when I purchase there in person. If you buy from there, let me know if they give you one on online orders too. Is a great reminder to change them with new projects
oh: one more thing: they have a HUGE sale every year. They open up their warehouse and it is for 2-3 days. FABULOUS deals there. I have seen busses pull up