Very easy to install and to fill. Used it last week and it works just fine.
Corrected our problem of Servers allowing Candle wax from previous "wick" lighters to drop on Altar Cloths and on the floor. However, once filled with the paraffin, device leaked the fluid out through screw on top. Solved problem by purchase an "O" ring at local hardware store and inserting between top and base. Suggest that manufacture adopt same adaptation. Also, purchase small bottle of sewing machine oil, and use its red cap on device to keep paraffin from evaporating.