The tour operators and community service providers we suggest offer guaranteed quality services. Beware of agencies in Flores and elsewhere offering low cost but low quality tours. Be flexible with your planned schedule. Guatemalans are not well known for their punctuality. PCS cell phone service is the only one available and only in the town of Chisec. Some useful items you can take with you are a flashlight for exploring the caves or if the electricity fails, disposable lighter or matches (for the same reason), pocket knife and an alarm clock (there is no wake up call service in most small town hotels).