I purchased one about 6 months ago. I've put about 900 miles on it while using it as a weekend bike.

I had the crank replaced with a Deore LX and switched out the pedals and saddle. All of this was done at the time of purchase and didn't cost me anything. Later I upgraded the rear rack to a Jannd Expedition. That came out of my own pocket. The stock tires were OK, but after a couple flats I switched them out for Continental Top Touring tires. The bike also has Freddy Fenders.

I haven't used it for an overnight tour yet, but I have made several rides of 50-100 miles in length. I've found it to be reliable and comfortable, even with about 25-30 lbs of food, water, panniers, etc.

Be sure you want a loaded touring bike. The heavier construction, especially in the wheels, will slow you down compared to a lighter sport-touring bike.

Note: I took the Trek rear rack from the 520 and put it on my commuting bike. The rack eventually broke, even though I rarely used it and never put more than a few pounds on it.