Having had a look on their website, they use a technique called "spin forging" which is not the same as true forging. They are basically cast wheels with the barrel strengthened by heating and spinning it while compressing with rollers. Unlike true forging, it doesn't do anything to strengthen those rather thin looking spokes, which are still only cast. Looking at this design, I would want to see much thicker spokes on a cast wheel so I would look elsewhere personally. True forged wheels are much more costly, but it's what you need in a design like this with ultra-thin spokes.
Cheap, strong, light - I'm afraid you can only pick two of these parameters!