Richard G. Harper said:
Since the bubbles change both the color and location of the pixels
slightly as they pass over, they pretty much do the same as any
other screen saver would. I don't use any screen savers myself, I
blank the screen after 15 minutes and save electricity as well as
the screen.
Note that the power saving only applies to CRT monitors. LCD panels
are lit up all the time, and a blank screen doesn't save any power.
With LCD you need to have it enter power saving mode where the
flourescent backlight is turned off.
Not really. The phosphorus in CRT tubes made today have a relatively
short persistence, so they don't easily suffer from burn-in. Unless
you leave the contrast at maximum and with the same window open all
the time (24/7), you generally don't have to worry.
The bubbles on top of the windows does help slightly with an extreme
contrast situation as the bubbles cause the phosphorus to react as the
bubbles float around the screen, preventing burn-in.
Personally, I just use the default saver with a 30 minute power saving
mode for the times I go out or get busy with other activities and
forget to shut off the LCD monitor (my computer is crunching 24/7 so I
just turn off the monitor when not in use).