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Pros
Pro Configuration via command line flags or configuration file
Configuration based on one file (~/.config/pqivrc).
See manual page:
"
[options]
fullscreen=1
sort=1
command-1=|convert - -blur 20 -
...
[keybindings]
q { goto_file_relative(-1); }
w { goto_file_relative(1); }
Similarly, you can also specify (multiple) actions to be executed each time pqiv is started in a section called [actions].
"
Pro Has a jump mode in thumbnail mode (montage mode) thats similar to vim-easymotion
See "montage_mode_follow(KEYS)" in the man page.
By default g activates jump mode.
Pro Can pipe images through external filters
Pro VIM-like key sequences, action cycling and binding multiple actions to a single key
Pro Keys are easily configured to a user command.
Keys can even be configured on the command line.
Pro Powerful collection of so called actions
Actions can be used to configure the interaction with the program (e.g. moving, file selection, view manipulation, UI appearance, simple image manipulation).
Actions can easily be used in the configuration.
Pro Rudimentary viewing manipulation
h/v: Flip the image horizontally or vertically.
k/l: Rotate the image right or left.
Plus/Minus: Zoom.
Pro Comes with transparency support
Pro Can watch files and directories for changes
Pro Quick jump dialog based on filename mask
j: Show a dialog with a list of all files for quick selection.
Pro Has infobox out of the box
Cons
Con Browsing a directory after opening a single file needs user intervention
Con Slow display
Going through a list of images is not as fast as e.g. with sxiv.
Con No selection of (multiple) files
Thumbnail mode hasn't any means of marking files.
Con Thumbnail creation extremely slow
Thumbnail mode is called "montage mode" (key m).