Apollo: I don't have any personal experience with this, but I did a quick Google search and found that a lot of people reported problems after switching to the generic. Note that the generic is required to have the same active ingredient in it - but the inactive ingredients, etc. can be different, which could cause different levels of absorption. So, a person might require a different dosage on the generic vs the name brand. (Note that almost all of the reports I saw were from people who switched from the name brand to the generic, not from people who started on the generic. And the majority of the reports were about a return of anxiety/depression symptoms, or headaches - both of which could happen if you were getting a different effective dose.)

Personally, I would stick with the name brand if I had used it successfully before and could comfortably afford it. But if the cost is an issue, you could always try the generic and switch back if it doesn't work well.