I've been thinking about getting a freeradical to add to my commuter (old mountain bike, pretty standard setup for freeradical). But here's the thing - as it stands now, about 90% of my riding is commuting back and forth to work with a single pannier of clothes. I generally don't use my bike to haul stuff around (though I suppose I might in the future).
So, for those of you have have one, is the xtracycle setup much of a hassle when it's unloaded (slow, heavy, etc.).