i made horrible experiences with the toner-transfer method. I tried different laserprinters, papers - i invested a lot of time in figuering out how to iron correctly, got it once, but another try failed again. Very very annoying!
I recommend everybody the faster, more professional photoresist alternative. The human error is less and its cheaper (about 30€) in my opinion. You only have to try photoexposure once. I etch with hydrogene peroxide and salt acid, its very fast, but you have to do it outside because of toxic gases.
Take boards from "Bungard" - this is important, they are very easy to handle!
If you are interested in more info, just write me again - i'll post the whole process then.
I attached pic's - the black one is tonertransfer(look at the holes
the nice one is photoresist. Both are 5cm * 16cm. Care the "WS11/12" - this is gonna be hard with toner transfer
(excuse poor pics quality)