There is a high volume of research literature in which shockwave is effectively used for erectile dysfunction. There are also numerous reviews on the subject. The most effective approach appears to be using low dose focused shockwave (a gross over simplification of a a lot of published work). There are many low cost and some remarkably dubious devices out there. I get messages in my inbox every week about these bits of kit (mostly from China). I do not know what the Walmart device is all about, but the evidence says, on my reading, that the applied dose of shockwave energy is critical for effective outcome. The devices used in therapy / medical practice are supposed to be capable of replicating these clinically evidenced doses. I might be wrong, but I would be somewhat surprised if a supermarket , over the counter device was delivering low intensity focused shockwave. One assumes it has FDA certification??? so I guess that if it is delivering the 'right' dose, then they will have demonstrated this to the authorities. Just because it is called 'shockwave' does not necessarily mean that it is delivering the optimal/evidenced dose for all indications - so without additional knowledge with regards this particular device (which I do not currently have) I could not say for sure one way or the other (others might know - will be interested to see), but in the meantime, I would (personally) resist the temptation to spend cash. Tim