Managing inventory with a lot of items

Hey all!

I am curious about you guys having problems importing products by csv, when you have a huge amount of items (maybe greater 100  or even more?). I had to set up a store only for 40 items but he fact, that you  can only assign an "image url" to the item, problems formatting the csv file correctly and so on took me a lot of time until I just decided to do it manually.

Can anyone share his/her experience here? I just saw, a lot of forum posts regarding the csv problem.