These maya ruins are certainly the best-known archaeological site on yucatan for tourism. The result is that about a million visitors come here every year and then they defile along the numerous knick-knack boothes. However, the great numbers also mean that the access to all pyramids and to other buildings was blocked for the visitors. Despite these restrictions, a visit is still very impressive. It was annoying that all visitors had to leave the site at 5pm and at 7pm there was a re-entry for the lasershow visitors (expensive tickets). If you love to look at honkey colorful illuminated ruins and then have to strive to understand the english translation via earphones against the roaring loud spanish version of the lasershow, this torture is recommended.
Wikipedia info: https://en.wikipedia.org/wiki/Chichen_Itza