Recently purchased a Dr Slick 3Γ’β¬Β ceramic bobbin- I really like the ceramic type bobbins- no sticking, very smooth- my only advice is be careful you know that a 3Γ’β¬Β bobbin will not seat a regular spool of thread- get the 4Γ’β¬Β bobbin.
I made that mistake- donΓ’β¬β’t misunderstand- the product is very good-