Our guide Ivan Rosales and his assistant were extremely pleasant and quite knowledgible about anything we had a question about, whether it pertained to the terrain, plants, cave dwellings, etc., etc. Great sense of humor also. The dune buggies supplied are primarily open with a roll cage and were quite capable with regard to acceleration and handling the rough terrain. Just in case of a mechanical problem which we did not have, a mechanic follows in another buggy. I would certainly recommend this excursion over others that claim to be similar. We spoke to some folks at our resort with regard to their experiences with other tours...and they all seemed dissappointed that they did not join us instead. Make sure you bring goggles and a scarf to cover your face from the dust. Also consider bringing a couple of shower caps from your resort to put on your head under the helmets supplied. Just a precaution as my wife is paranoid about getting cooties from someone else's head This is a total thumbs up tour!!!