Your boobs are too big or small, it hangs down weirdly at the back, and the colour highlights every blemish on your usually wonderful complexion. You try on a few different colours and sizes, you mince up and down in front of your friends and then eventually discard the damn thing and forget about it when you find a better one in the shop next door. Although there are some advantages to shopping online. They ll also let you enter their competitions, and there is the off chance that you might win something. There are no drawbacks in all that, but, when it comes down to it, you might as well go into the shop, try the stuff on and then go home and order it online to get the savings.
Accessories are normally fine to buy too.
Grab a watch, grab a belt, grab a bag or bottle of perfume, and you ll usually save a few bob and a fair bit of grief down at your local Westfield. But if you care about the cut of your trouser, and the length of your sleeves go to the actual shop before you go to the virtual one, and you ll win out every time.