Dmitry Smirnov
Google
Certainly Chan Chan is one of the historically highly important archeological sites in the country. However, from a visitor's perspective the site has a few drawbacks. First, there is very little to no information at the archeological spots (only some in the museum). At the main site you can not even tell what is "original" and what was reconstructed. Second, the complex is large and scattered across the area (the ticket covers four spots) - you either need a driver or be prepared to walk quiet a lot. There is also no information on where to start and which route to take between the four spots.
Of you habe the time, pay this site a visit and decide for yourself. Bit if you have to choose, I would personally recommend Huaca de Luna instead for a half-day trip.