I think the only real disadvantage of the LHT trucker compared to many other bikes is the weight. If you need a bike that you can throw over your shoulder to climb up and down steps in an apartment complex or subway, a lighter bike might be a better choice.
That said, if I could have just one bike, it would be the LHT. I bought mine last April in olive green. It's plenty fast on the flats, and it downhills and corners better than anything I've ever ridden. It's definitely slower on the hills. With the standard gearing, you can get up almost any hill.
I came to like the bar end shifters so much that I put a set on my road bike. I re-routed the derailleur cables on both bikes so it runs underneath the bar tape. It's very clean like a campy-equipped bike.