RE: OK, so I've thrown Ido out and turned on Icicles. What now?

[Drew Adams]

> > Now I'll try to read the quide on the wiki, in small part, and
> > replace my Ido habits with Icicles-related ones.
> 
> Interesting.  It would be nice, if you could follow-up this thread
> with your findings after a while..
> 
> PS: As far as I checked (default) Ido worked only for files and
> buffers.

3rd-party Ido library `ido-ubiquitous.el' mitigates this.
https://github.com/technomancy/ido-ubiquitous

> And its keybinding RET clashed with (default) icomplete-mode.  I
> switched Ido off because it confused my small brain.  Is Icicles in
> this respect somehow smoother?

Dunno.  Ido mode is incompatible with Icicle mode.  But you can
get behavior somewhat similar to that of Ido while in Icicle mode.
http://www.emacswiki.org/emacs/Icicles_-_Ido_and_IswitchB.  Not
that I recommend that.

Anyway, Icicles is compatible with Icomplete mode (and with IswitchB).

And because `icomplete-mode' computes all completions each time
it is invoked, and because Icicles provides incremental completion
(recompleting each time you type or delete a char in the
minibuffer - you can toggle this using `C-#'), you sometimes want
to turn Icomplete mode off (e.g., when there are zillions of
matches), you can toggle Icomplete mode on the fly, using `C-M-#'.

http://www.emacswiki.org/Icicles_-_Icompletion#UsingIciclesWithIcomplete