Grad school while working full-time? Too much?

Grad school while working full-time? Too much?
If you did grad school while working full time, did you feel it was okay or too much? Assume you took two night classes each semester. This is what I anticipate doing in the spring. Thanks in advance. And please feel free to qualify your answer with how you juggled it, how you felt, what you did around test-time or paper/essay time, things you would have done differently, etc.

I am in grad school right now and I do work full-time and it isn’t easy. I get off work and go to class, and don’t have any time for myself, but I know that its worth it. It’s better than taking out a whole bunch of student loans that I can’t pay back, or taking so much out that it’ll take forever to pay back. And I also take summer classes. So it just depends on how much you want to succeed and the time and effort that you are willing to put into it. If you take it one day at a time and try not to stress about the next month or so it wont be so bad.