After a week and nearly 600 miles in an Acura 3.5RL, at least two things are clear. Acura's flagship sedan does not have a single shortcoming. Nor is the 3.5RL the best $40,000-plus luxury sedan by any single standard, or in any particular area. This car does a lot of things well, and it does almost nothing badly.Acura is American Honda's luxury division, and like so many Honda products, the 3.5RL's strength is balance. There are expensive sedans that are either smoother, more powerful, more agile or faster. Yet the RL is plenty smooth, powerful and agile, and it's fast enough to more than satisfy most luxury car buyers.Click here to read more