I have been really pleased with CT. Yes, it is a little linty, but I always clean my machine after using it, so it's never been a big deal for me. I especially like the thread cones as I have used them for both piecing and quilting. I have never had problems with thread bleeding, but I have taken caution when using their red thread.
When money is tight and 100% cotton thread is less than $3 a spool (and a big spool at that) I just can't pass it up!