Posting this in the forums as the TripAdvisor administrators won't allow reviews of Travel Agencies even though this company operates tours as well. Here is my originally written review on the company and hope it helps future travelers:
1 out of 5 stars
The San Juan Travel Agency is not on Trip Advisor but deserves to have their business presence so that honest feedback can be given.
We used their company 3 times mostly because they have the largest presence in Flores, but we would not recommend using them unless you had to. Our three bookings with them were:
1. Van from Belize City to Flores, fair price and went well, just that they advertised as if they were a big Bus and not a van. Upon arriving to Flores the driver picked up a San Juan employee (scar on left check) that told us all ATM's on the Flores Island were out of cash and pressured us to getting local currency at the supermarket. Next before dropping us off in Flores pressured sold us on how San Juan has the cheapest tours (not true) and that the ONE TIME ONLY prices he was offering couldn't be beat. Once we insisted no sale that we preferred to wait he was nothing but rude and told us to get out of the van in the middle of Flores (where originally they said they would drop us off at our hostel).
2. We booked through our hostel Transportation from Flores to Tikal and back, had we know it was with San Juan we would of went with someone else, but it actually went very well and we enjoyed their service. Timetables for return trips were limited. We decided perhaps our first experience was just one bad employee and not to judge the whole company.
3. Booking transportation from Flores to Antigua, after our second experience going better we found San Juan offered the cheapest "1st Class" bus service from Flores to Antigua. The "1st Class" service was with Rapido del Sur bus line which after taking it we learned it was "2nd Class" and San Juan Travel had lied to us as they showed us brand new "1st Class" buses and the one we got was from the 1970's with people sitting in the isles, plus insult to injury we overpaid by double versus just going to the bus station by cab and booking directly.
Avoid San Juan Travel Agency if you can.