I use this on a VW Jetta and it works well.  The dipstick tube is like the flexible sheathing that covers bike brake cables, so it's flexible, but stays on the bottom of the oil pan.  You just pump it up and about ten minutes later the oil is drained.  Plus, on VWs diesel you can use it to suck out the oil filter casing.  I wish it was easier to get all the oil out of the tube, or reservoir after use.  Drips can cause stains.