I took the bike for a 50 mile ride in the heat yesterday. It went well. The bike isn't the best fit for me but it isn't meant to be a long distance bike but a spare. I wouldn't want to take it for 100 miles. But 30, 40 miles would be perfectly fine and perfectly comfortable. The 50mm stem makes a huge difference.

Frankly, what I now dislike about the bike are the brakes. They are not as easy to pull and not nearly as effective as the brakes on my Madone. I find them a bit hard to operate from the hoods but fine with the extra leverage on the drops. It might just be because they are a lower level component. Is there some kind of adjustment on the reach of Tiagra brakes? I can't tell by looking at them.