JMHO:
Feminized seeds are useful if you need a large harvest fast. You can expect most of your plants to be straight female, so you can grow many many plants right off the bat without worrying about males.
Here's the kicker. Fem seeds do grow hermies. usually not many, but they happen more often than clones would in a controlled environment =D
If you aren't in a hurry to flower as many plants as possible, i would suggest regular seeds. you can clone the fems to make a larger grow, and you can use males to create seeds from the better females. The seeds you grow will all be slightly different, and some may produce better in your specific setup. Those ones can be bred later (from clones) to help you dial in your strain.
I personally think feminized seeds are a waste of money for most growers. Very expensive, and you can't breed em with predictability.