I also tried these. I love them for burying threads in the quilt. I don't love them for regular sewing. I tried them for a binding. I found that they would occasionally catch on the threads of the fabric and pull them. While it didn't happen with every stitch, it bothered me enough to go back to a regular needle. I think the issue may have been the angle at which I was using the needle.
For pulling threads into the quilt for burying they were fine with an occasional pull on the batting. But given how many threads I had to bury, it sure saved me a lot of time and effort.