Experiences and Thoughts on SHFS?

eugene ts wong asks: "I was looking over SHFS, & I thought that this seems like a very good software package. If I understand it correctly, then it should be the defacto way to mount shares across a network. I never heard of it till today, though. What do all of you think of this? What kinds of experiences do you have? I am interested in hearing some of your stories. I heard that NFS isn't secure. How do they both compare? Would you recommend SHFS for small, medium & large businesses?"