Air conditioners!

Has anyone had experience with portable air cons? Are they as good as a window air con would be?

Going to buy one tomorrow. The mid 40 days are killing us & we're only half way through summer! Plenty to go...

I have a frame & power point on a whole separate line alone in the kitchen already, so set up for a window air con, but the portables seem to be a little cheaper for the same thing? I know they need to be ducted out... and I can move a portable one around the house...

Any info either way is handy please Brand name/models or sales could be handy too, but I will only have a limited choice. Betta/Retravision are the only stores I will have access too.