My main gripe with the program is the memory limitation issues that come up when dealing with large sets of images, which you may run into for survey work. Overall I prefer PhotoScan to any other photogrammetry program I've used. I actually prefer ortho generation in both these programs to PhotoScan since you can choose to use an imported dtm, they have some options for radiometric correction, and they both have good seamline editing tools. SocetGXP produces excellent dsm's and dtm's, but I personally prefer the point cloud output which it doesn't offer. With regard to dense point clouds, Imagine EATE will occasionally produce very noisy dense point clouds for some image pairs, but the SGM extension is probably much better. Triangulation is much much faster and easier in PhotoScan than either of these programs.
I also have some experience with Imagine Photogrammetry and SocetGXP. That was an instant deal killer for me, so I can't comment on later steps of their process such as dense cloud or ortho generation. It failed to align my images every time even with the high quality sets that had initial exterior orientation and camera calibration. I recently tried Pix4D mapper with a few small test sets.
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