This is a great thread - so let me add 2 cents - one of which might help improve the image of Norte Americanos when and where it might be useful. I noticed once where a Mexican lady returned her (uncrinkled) ticket to the bus driver while leaving the bus. I asked someone I consider knowlegeable there why she might do something like that. Apparently, that's a way you can 'tip' the bus driver. It seems that this provides the bus driver with the option of giving that ticket to another customer and pocketing that passenger's bus fare. Not condoning anything here - just passing along something I observed. One more thing about taking the buses. Do NOT try and take the bus downtown from the hotel zone betweeen 4 and 6 PM on weekedays if you can avoid it. That's when all of the construction crews in the hotel zone let their workers go home, and the busses are all packed to the gills. Hope this helps out.