The rings are an essential part of the process as thay trap the blood in the penis which maintains the erection. I used the pump for 2 months with good success, although sometimes there was a loss of hardness, I just pumped it back up. My wife said she could not feel the rings however I was not as firm as prior to surgery. After 2 months I graduated to generic Viagara and 4 months later left the Viagara and went "au natural".
The pump may have helped in my penile rehab, I think it did, but have no proof. You should shave around the base of the penis to get a good seal and avoid that painful hair removal when you remove the ring.
I used the Osbon manual pump, cost around $150. Rings have the side effect of helping to stop urine leakage during sex, I leaked badly at the time but rarely during sex.
Biopsy, both lobes PCa
open RP May 18, 2010
Pathology: 15% involved, lymph nodes and v. d. clear, margins clear
June 3-10 10-12 pads/day
2 months 8 pads/day
Aug 1, 2010 5-6 pads/day
Aug 20, 2010 3-5 pads per day
Aug 16, 3 month PSA: undetectable
Sept 22, 2 pads a day
Oct 12, PSA 0.03
Dec 1.5 pads a day
ED OK with no drugs Dec 2010