- If you are always on the go or if you have a static IP, you don't have a finite internet access, so logging into Hamachi is going to be a hassle, because you would have to set up your preferences.
- If you do not have a good connection, it'll lag and cause problems for both players. With the majority of it being automated, you'll be forced to wait a lot longer than you should, and if your opponent is impatient,...yeah, it'll just be bad.
~~~
For other news, I want to comment on a couple of weblinks:
Does it feel like Konami's pushing for players to play Hieratics?