Shopping online is great. You can't beat the convenience or prices, but the research can still be a real killer, especially if you're looking for a particular kind of item (say, a car stereo) with certain features (aux and USB inputs) that are not reported by the website you're looking at. I can look at car stereos at JB HiFi, but if I don't care about the brand, just the particular features, I'm out of luck. If you need that information, you have to read every description or check the manufacturer's websites and collate it yourself.
Mokalus of Borg
PS - And that can be its own kind of frustration.
PPS - I rarely care about manufacturers more than features.