I definitely believe in it. In about 4 and a half months, I have only gained half an inch of girth (just changed my routine this week so hopefully it will help), but I have gained around 2 full inches now in erect length. The reason I say around is because when I started I measured using an envelope and then tearing the side where I was erect. I didn't press down that hard, so it is possible I may have gained more than 2 inches to date or perhaps less if I tore at the wrong spot. Either way it is probably plus or minus 1/4 inch.
According to the envelope I used before I got around to buying a ruler, I started at a pathetic 5-1/4 inches bone pressed and I am now at 7-1/4 inches at 80-90% erect (I would need to rest a full 3 or more days to see how far I can fill that 7-1/2 flaccid stretched length). I never measured girth at the time, but my girth I would guess has increased half an inch because I am 4.5 now and I was probably needledick small at 4 inch girth 4 months ago. The odd thing is that I keep getting more vertical width and not much horizontal width so maybe I need to do some DLD roller pin excercises (-;
Maybe I will post everything I have done since mid-October sometime soon here (got work to do at the moment), but I have learned a few things about what seemed to get me gains and what didn't:
(1) Basically, just like with bodybuilding (depending on who you talk to) how you feel after a workout is really important to the growth process. I don't bother counting reps of jelqs or stretches or any excercise for that matter (I make sure I don't hang or clamp for more than 20 minutes of course), but stop once I feel like my willie has gotten a good workout. With manual excercises I think this is super important because the quality of the stretch depends a lot on your hand, shoulder, and tricep strength (I lift
weights so it helps for me). In fact, manual excercises are so tough that I need to make sure I do my lifting before hand, otherwise I find myself only doing about 3-4 reps of a curl as opposed to 7-8 and shoulder excercises like military presses or lateral raises just don't work at all if I have been Penis Enlargement'ing at least 12 hours beforehand.
(2) I have learned a lot here as well as at Thunder's and nobody seems to be in agreement on what the best excercises happen to be. Well, just like with the weightlifting routine I do which focuses on doing as many excercises as I can for every major range of motion so as to get all around muscle strength and not just big for big's sake, with Penis Enlargement I try and do a little of everything and mix it up a lot to keep things interesting. I probably change my excercises a bit every 2 weeks or so, just whatever I am doing I make sure that I do a variety of excercises and not just one or two for length and one or two for girth. Usually, I don't stop until I either run out of time, my arms give out (used to have that problem but don't anymore), or I feel like my willie is nice and sore in a good way.
(3) Especially with girth excercises, you have to feel the stretch internally otherwise I don't think you are really doing anything other than maybe keeping it in shape. RedZulu does some crazy intense excercises that obviously push his penis to the limits and so lately I have been trying to make sure that I do my clamp sessions long enough and with enough intensity that I can feel the tunica stretching from the inside as a result of engorgement. If I don't have some post-workout swelling (not too much of course), then obviously I am not doing much to build up my girth, and in fact I might be promoting a hardening of the tunica which will make future gains more difficult. I have a small improvement over the last week, but I guess after a month or so I will find out if this change in my routine really broke that measly half inch girth plateau I have been stuck on.
This might sound kind of controversial, but I really don't think you can overtrain the tissues of your penis, just that if your PC muscle gets overtaxed it might be hard to sustain the erection you need to do quality girth work. In fact, until I started clamping recently I had hit a girth plateau and really had not felt my dick stretching from the inside as if I was really doing anything. That is not to say your dick does not need time to grow, but if you get enough sleep I think you can do both length and girth pretty aggressively so long as you don't strain your ligaments making them susceptible to injury and you don't overtax your PC muscle. So basically, if you are not making gains, it could be because of heredity but I would wager you just are not working out hard enough to the point you really can feel the tissues of your penis stretch lengthwise as well as internally.
Hey, I am a newbie myself (non-newbs have at least a year under their belt and experts at least 3 years) but I thought I would chime in here to say I am more than happy with my results to date and by this time I only expected to gain around an inch, but for the reasons mentioned above as well as probably heredity and other non-Penis Enlargement related factors, I have managed to grow a full 2 inches. Of course, I may never get another 1/4 inch after this, but most of my gains have been through the tunica so I am optimistic when I get a chance to hang more aggressively and more regularly that I can can get to at least 8 inches (just better make sure I bump my girth up a bit unless I want to have a spaghetti noodle for a penis rofl).