The only known problem with the EOS 3 is that some early models exhibit an underexposure metering problem. Some early adopters of the camera sent theirs in for a firmware upgrade, but I heard that Canon fixed the later batch of cameras. But wow, is it a nice camera. It is significantly heavier and bulkier compared to the Elan 7-series or Rebel cameras, but it's built well and takes a beating. Mine has gone through snow and rain, and it keeps on going.