Robotkiller made some pretty good points,
you dont have as many part as other bikes, so you notice the little things a lot more easily, and It can git on you nerves if you are used to a certain thing.
I really like steel tri bikes, and they tend not cost all that much luckily .
Wheels tend to cost me the most. Some people cant stand then flex. so they have to ride aluminum. The thought of that makes my back hurt.