I dont mind playing 2 tables at once, but this has both negative and positive effects:
+ As bill said the amount of money you make hourly is greater multi-tabling.
+ When getting a run of bad cards at one table you still dont get tempted to play weaker
hands as you´re in the action at the other table.
- You cant possibly be pick up as much info while playing more than one table
- You might get stressed when you get to tough decisions at the same time and in worst case make mistakes in both hands
Whenever I´m playing tournaments I like to have a little something at the side but in the later stages I prefer concentrating at one table