Hey there!
I have not tried the Hardwear, however I did browse some opinions yesterday. Some were very pleased. There were quite a few how found the sizing to be an issue. And also the price was a breaking point for many.
Lately I've tried some Oxballs rings which have been pretty nice! I have the Powerballs ring and Cocksling. The Powerballs is made from TPR, but better made than some rings I've had from the same material. Very rigid stuff!
Oxballs also offers silicone variety, such as Hung, a huge silicone ring meant for wearing around the whole unit. Have a look into these. They're not cheap, but usually cost less than Hardwear and there's not so much sizing issues.
Some guy mentioned that he actually made a
cockring by himself, using similar shape to Hardwear, but with lesser curving or so, custom made fit. That is one way to go.
Sorry, don't know about Viagra. From supplement point of view, I suggest L-citrulline which will "convert" to L-arginine. Really nice for bloodflow, some people also report bigger ejaculations. Myself, well, I need to train my PC muscle more! I feel my penis has grown so I need more PC muscle training to really shoot that load. But overall it's a good supplement, combine it with some zinc, maybe maca, many options are available. Still waiting for DLD's supplement!
Maybe someone has a tip where to find Viagra.
Have a great day!