I have every brand and some not brands. LOL I like the new surgical blade seam ripper. It's zips through a seam, no picking and cutting single threads. Just be sure and get the blade that has a handle, they are hard to hold without one. Clover regular seam ripper is usually my choice to buy when I find a sale. I discovered that if you buy the hard cushioned handle ripper like Fons and Porter, the handle will quickly remove the cut threads from the seam. I didn't believe it until I tried it. I noticed Walmart has the Dritz ergonomic seam rippers now. Pretty colors too. I woudn't waste my money on the $1 rippers, they aren't sharp enough, you have to tug on the thread to cut it. Many think that is how a ripper is suppose to cut!