You guys misunderstand how the Aneros devices are supposed to be used. They are NOT a replacement for a dildo. The goal is not PENILE orgasms (with ejaculation), but ANAL orgasms. When used according to the instructions (and with some practice), many (but not all) users should be able to achieve one or more INTERNAL orgasms that involve the rhythmic contractions of the rectal muscles. Those contractions press the Aneros against the prostate and stimulate the nerve endings there. The external "tab" opposite the loop on the Aneros presses against still more nerves in the perineum. All of these things work together to create a feedback loop, increasing the sensations. Believe me, these internal orgasms can be just as pleasurable as a "normal" orgasm. The additional advantage, however, is that because there is no ejaculation, there is no real recovery period, so you can have several of these orgasms in a single session. They tend to come in waves; the amount of time between them depends on a lot of factors and is different for every guy.
I have been using Aneros devices pretty regularly since 2005 and have tried most of their product line. Many users describe what is called a "super-O"--an internal orgasm that is so intense that it is practically an out-of-body experience. Guys often lose control of their muscles, especially in their lower body; I have seen guys whose legs are shaking and spasming so strongly that they appear to be having an epileptic seizure, thrashing around and sometimes practically falling off of the bed. I personally have never been able to achieve this level of stimulation, but I keep trying. It may be that my brain is just not wired that way, or I have not learned to relax enough...or that the antidepressants I've been taking for the past 20+ years have altered the pathways in my brain so that I am unable to get there. But I have come close, and have certainly experienced several of these orgasms over the period of an hour or two.
Yes, the Aneros "tools" can be used to enhance a penile orgasm. The muscle contractions when you cum still press on the prostate and practically pump the semen out of you (actually it is the prostatic fluid, not semen). The added stimulation of the prostate during ejaculation feels amazing, kind of "supercharging" your orgasm. I admit I use the Aneros devices more like a dildo when playing with other guys, because the intended use is much more of a solo activity and takes practice to be effective. In particular, guys who are not used to having anything in their butts are surprised at how good it feels. Even guys used to being fucked enjoy it more, because a penis in there hits the prostate only incidentally, while the Aneros devices target the prostate much more directly. Several guys have told me that I have given them the best orgasm they have ever had.
If you want to see what an Aneros can do when used as intended, go to xtube.com and search for "Aneros". In particular, watch the videos from a user named "Anerosexual". This is a straight guy who is VERY responsive to the effects of the Aneros and you won't believe how intense his reaction can be!