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I'd say for the learning experience, it's a nice thing to do. Other than that, go with a pcb manufacturer.
When I made them on my own I sort of did it scientifically where I made my own light box and tested with different exposures and different acid etching techniques and even did several layers of transparencies to get the blackest lines. I learned what worked the best. I posted my results but I doubt anyone really cared or used my results. I made so-so boards good enough for me. I broke lots of tiny drill bits. I wasted lots of boards in the process of trial and error. I blew lots of money. I learned a lot, though!!!
For the same money and much less time, I could have had lots of PCBs from a manufacturer. But I wouldn't have learned all I learned. I'm a self-educated human being! (It could be argued that you can only be self-educated. True you can be taught, but only you can learn for yourself and be educated. Things can't be learned for you.) Now that I've learned the process and gone about as far as I care to go with it, I'll use a PCB manufacturer from now on.
To me it's a great discipline/exercise to learn but it's not really worth it for anything real or with any quality. It's good to learn it for yourself. You really can't beat the cost or quality from a manufacturer. So do it for the experience only.
Here's another article that also came up recently with a slightly different method involving glossy magazines and an iron:
2012 Top 10 Robot Christmas Gift Ideas
DARPA Robotics Challenge Kick Off
2012 ASABE Robot Contest Photos
Interview with David L. Heiserman
David Anderson on Subsumption Robots
Review: Apocalyptic AI by Robert M. Geraci
Raspberry Pi Interview with Eben Upton
2012 VEX Robotics World Championship
Giant Dallas Robot Cited as Best Public Art
There's More Than One Way to Skin a Robot
Day of the Androids at Hanson Robotics
Apocalyptic AI by Robert M. Geraci
Robotics Programming 101
Pololu 3pi: the 10,000 Mile Review
Unofficial LEGO Mindstorms NXT Guide
Machinima Review: Stolen Life
i-ROBOT Poetry by Jason Christie
The Definitive Guide to Building Java Robots
Microbric Viper Kit
Introduction to Autonomous Mobile Robots