Homebrew PCBs

Okay, as you all know I am far from experienced with PCB making.  I 
have gone through a variety of trials with the toner transfer method 
and can appreciate it.  I can somewhat see it's limitations with 
regard to how small of a trace I could do using this process.  
However, if I ever need more detail, I could do the photoresist 
process.  The chemicals work good and efficient, all around, etching 
works very good.

Now about 6 months ago, I was wanting to do isolation milling as I 
believed it to be better.  However, I am pretty much now in the 
belief trying isolation milling will not show any advantages over 
what I am doing now.  I seriously doubt it would be faster than 
chemical etching.  I don't think the tool bits would last very long, 
so I would guess that the tooling costs would negate the costs of 
the chemicals. Even though you would be cutting with a very small 
diameter pointed tool, I don't think you could get better results 
(finer pitches and traces) using a milling process.

Is there something that I am not seeing in that process that would 
give it advantages over chemical etching?

Thanks guys

Chris