My routine is not far from the bathmate recommendations,
Warm hot bath, pump and hold for 5 minutes, or until water gets cold in tube, refill with hot water, pump and hold for 5 minutes again, repeat procedure until I have pumped for a total of 20 minutes.
I have seen quarter inch growth in length and about an inch in girth, the important thing for me is erectile quality, as my physiology is grower not shower.