Many people in my area use a break cue quite often, and more importantly quite a few of those are break/jump cues which is probably as important to have handy as a dedicated break cue. The jump part makes a lot more difference in the game than just having a break cue. To prevent damage to the playing cue tip/ferrule/whatever you can use a house cue, but for being about to take down the breaker into a jump cue, nothing will take the place of that. While not really the question, IMHO a plain break cue is maybe a 10% added value, a jump/break cue is near 100% value since you just can't replace a jump cue with something else that will be almost as good.
A "fancy" break cue does not add anything to the breaking ability or success, it's more of a good feel of the break hit, like a $4 latte with a cute heart and a $1 plain coffee at the core will inject you with the same caffeine, the main difference is the flavor and experience you get from it not the hard scientific facts of what it does. I love how my son's $600 Predator break cue breaks, but I don't think it actually helps with a better break result, I get the same spread when using a house cue or my cheaper break/jump cues. However for the balance and hit feel, it's over what I have.