We just finished a trip to the Cartagena area with a large group. We used a variety of local guides.  This service was mixed with good and bad.  Their tour suggestions were by far the most varied and interesting of any of the guides we contacted.  Unfortunately, because of our travel during the pandemic, many of these weren't available in the end.  Their attention to detail was excellent, perhaps the best of our guides.  However, they were a bit inflexible.  Our group had issues with passports and illness and we had many group members cancel.  Other guides were more forgiving about cancellations.  The biggest problem that our group had with this company was that the English spoken by the guides was less fluent than our other guides.  

In summary, despite our difficulties, I would recommend this company for Spanish speakers in smaller groups than ours or after the pandemic is over. I would particularly recommend them for someone with an interest in sightseeing in a different way, with more unusual (especially artistic) tours.