My experience of Pico Plaza was slightly different from the previous reviewer. I've bought a few things from Pico in the past (mp3 player, two phones) and have generally found them be quiet well stocked, with lots of choice, but a little lacking in the service department.
I usually research what I want before I go so this is not normally a problem for me, but I recently went there to look for a laptop I was buying as a present so needed a little help. I could not get anyone to help me at all, not even one store employee was prepared to assist me, regardless of which language I was speaking. Perhaps it was an off day, or it was too close to closing time.
The other negative thing about Pico Plaza compared to other electronic superstore is that they are slightly more expensive, but as I mentioned before they do have a good selection of goods.
I wish they'd get rid of those blaring speakers out the front though...