The thing that irritates me is getting a new piece and I know I have to tweak things to get it right. I will add that I always get a good quality piece from here, but ther is always one thing that needs tweaking. I can't tell if it is right untill AFTER I attach, then the issue show up. To thick or direction is funny, color close but not right. Eventually I get it right. I also dont like the "Pouffy-ness" of a new piece. I prefer smooth laying hair, I am NOT into hair-doos that defy gravity...