In my opinion, Silky Saws are superior to anything else I've tried. My students tend to raise their eyebrows and get big smiles on their faces when they try the Silky after trying other models. I find that Silky Saws use considerably less energy to do a cutting job than other types, so I believe them to be well worth the price. In survival situations, energy-management is very important.
Note that some Silky models have straight blades (like this one) and others have a slight ergonomic curve to them. I recommend considering what application you'll have for the saw before deciding on which model to use. For instance, the curved blade types are definitely more efficient at making full cuts through material. In this case, however, I wanted a saw that could easily make flat cuts for bushcraft construction projects, so I elected for the straight blade. I have both types, and I love them both!