I am an American Living in Mexico and as such find my Lonely Planet Mexico guide of much help. Basically it is (1) instrumental in getting my bearings in most cities where they include maps; (2) helpful in locating some hotels and tourist destinations (museums, other sites, etc.). But (3)understandably at some level, the hotel rates and bus schedules are grossly underestimated. Most lodgings are at least $10 more or even double the least-rate published for a particular listing, and you need to add an hour or more onto their bus times between cities. My guess is that the LP reps are asking the desk clerks for schedule information. The clerks always lie as the bus companies are very competitive and they want to you to buy a ticket from them. So for example, LP says that it takes 2 hours by bus to go from Zacatecas to San Luis Potosi (which is true by car), when actually it is ALWAYS 3 - 3.5 hours by bus. Also, I am not certain how LP aquires hotel rates. Unless you walk in "Undercover" and actually rent a room, you will not get the actual rate. For example, LP has Pasada Acueducto in Queretaro listed as $15/17.50 in the budget category, when in fact the cheapest room is over $30. The Hotel Operators lie to get LP to list at a cheaper rate to drive tired tourist to their destinations first. So Beware, use the maps and destination listing, but ignore any rate or schedule info. Unfortunately, LP does not have a subscription companion site, where listing info could be updated and customer comments shared. Their website is basically a storefront for their products and not of much help. I'd gladly pay more for a companion subscription site.