I've been shooting one of these for a year now. Yea, it's really just a fun toy.
Durability:
The stings are stone mountain B-50. The only issue I've had with the strings is that my microlite nocks chewed up the center serving, but those are tight nocks. The flemish strings PGU sells seem to work better, but you can probably find something ideal at Lancaster. I've had no issues with the riser or the limbs. There is a youtube review by Oregon Survival Network showing the guy unstringing the bow after being strung for a year in all weather and they went straight right away. The bolts that attach the limbs to the riser are the weak point. They seem to be an anodized stainless steel rather than the aircraft aluminum of the riser. This means that they can corrode after a few years of mistreatment. But so will any bow string. My gripe is that they do not offer replacements on their website. Sure, you can probably email them and they'll send you replacements, but I'd rather they admit this and just offer them.
Coming from shooting indoor compound, I expected a learning curve and stuck with it. The limbs do stack a lot. Even with the 55# limbs, my 26" draw feels like it's only pushing 40-45#, most in the last two inches. Accuracy-wise, I think it shoots on par with any of the beginner range recurves. That said, the biggest issue in learning to shoot this bow is the grip. Since there is no real grip, getting a consistant bow hand takes a lot of repetition. The grip is better than other folding survival bows, though. One such bow riser is essentially a metal 2x4 with a plastic rest glued on the side!
Conclusion: It is fun to shoot, but not practical for most people. It could be practical only if you spent a bit of time and money finding the right arrows (which I have not, yet) and get enough practice. I call it my Sunday-funday bow, and it's a blast.