Avantages
Excellent product training. HR teaches you 401k, health insurance...etc in a class room setting for initial training which is very helpful right out of college. After you completed training, you will be expected to go on sales calls on your own and present in front of potential customers. These range from small start up companies to large companies like Apple, Intel...etc. People listening to your pitch are usually managements. it can be intimating at first, but once you get used to it, this experience can be very useful later in life (you will be comfortable presenting in front of 10~20 complete strangers).
Inconvénients
There are a lot of politics within the company. The management can be harsh and critical of you, sometimes just to make them look better. Endless cold calls, your management will be constantly watching and listening to the quantities and quality of your calls and what you do. Basically you are constantly being watched during work. During quarterly review, even the smallest detail can be a reason for your major deduction in points. Strict and rigid Japanese culture, can't be late, can't leave early, be on time back for lunch...etc. Constantly under stress and pressure to meet monthly sales goals.