I have used most all brands of thread. The best thread ever is silk but it's not practical money wise for general sewing. I like Connecting Threads and have a lot of it. I like Coats and Clark metallic, it never breaks or frays. Superior Sew Fine and Bottom Line is great for bobbins. Glide by Fil Tec is excellent for machine quilting. I have discovered InvisFil threads and it is almost like sewing with silk. I watch all the thread sites and when a great clearance price is on a set I buy it. I got four sets of 8 mini king cone spools of Aurifil thread for $16 each and can only say it's good thread but not worth me paying the full price