I agree with keeping them on f/t! My balls all came to me on live, and my adult male had some troubles with the med. rats he was fed, he got some nasty (luckily not too horrible) bites while on live until I was able to get him on f/t. If you do switch to live it will be an easy transition usually, but switching back to f/t can be a problem and can take a very long time.

The only people I know that feed live are people with large snake collections, and even then some of them pre-kill the mice/rats before giving them to the snakes so their animals do not get injured (by large collection I mean they have 20+ snakes, I feed all 12 of my snakes f/t with no problem).

Also some benefits to f/t:
You don't have to care for them since they're dead
You can store them so you don't have to breed your own or buy them from a store every week
They can't hurt your snake!
They are usually cheaper than live