I love ZoomBrowswer. I heard people complaining about Image Browser when if first came out... Valid complaints, like it crashes if you have too many photos, and chose to ignore it.

Why do I love ZoomBrowser? Because I can go through a folder of pictures quickly. The windows image viewer takes forever to decode each picture, maxing out my CPU causing my fan to go loud. Whatever ZB does, it does it nearly instantaneously.

There are two features I wish it had.
1. To be able to zoom in. Perhaps it can with jpeg files, but the sliders are greyed out on RAW files.
2. To just send my file to an external editor. Don't think about it. It complains that I must convert my RAW before I can edit it. No, my editor supports RAW, stop trying to outsmart me. Grrrr. Right now I have to find the file in explorer, after having found it in zoom browser. Not ideal.