The silicone shaft has just the right amount of flex for me—stiff enough to guide in, but it gives where I need it. My only gripe is that cleaning the seam where the metal meets the silicone takes a little extra care, but that's a small trade-off.
Sebastian W.★★★☆☆
The metal ball end is exactly as smooth as advertised, but I found the silicone shaft a bit too flexible for my liking—it didn't hold its position as firmly as I'd hoped. It does the job for a quick session, though I'm not sure it's worth the price for how often I'll actually reach for it.