This is only one data point, but I have a 2GB Elite Pro CF card from Kingston. I've not had a single problem with it in my Canon 20D or Minolta A2. In fact, I later bought a Lexar 80x Pro 1GB card based on the CF database. Although the Lexar is supposed to be much faster (in the 20D), I cannot tell the difference in use, to be honest. I am glad I bought it, but YMMV.