Change your address!!!! I booked in advance with you, and tried to find you using the address on your website, email and Google Maps, so I could drop off my bag for the day, but you have moved! I wasted 2 hours trying to find you and lost most of my only day in Antigua. (FYI everybody they are on 6th ave around 2nd or 3rd street).
I visited Guatemala with Sin Fronteras in summer. They organized everything for me, with amazing services and really welcoming staff. I highly recommend them.