Has anyone done these? [mamameech I know you have

]
Anywho, I recently started looking at ordering some from various websites that will make everything for you and I knew they were expensive, but yikes. I just googled DIY invitations and saw a bunch on Amazon (20bucks for a pack of 25). This is a lot cheaper than ordering for a company.
For those who have gone the DIY route:
1. Did you buy the packs then have a caligrapher do it, or did you just sent them through your computer printer?
2. Is it a PITA?
3. Is the amount I would save really a benefit to the whole DIY PITA factor?