We just returned last night and did have an issue with luggage from Beef to San Juan. We have a soft-sided Yeti cooler that was too big for a carry on even though on paper it fit the requirements. The space under the seat and in the overhead compartments is very small. On the trip from San Juan to Beef the nice rep at the counter checked it for us for free, but the lady at Beef refused to check it through for free even though we knew it wouldn't fit on the plane. We had to wait until we got to the plane for them to tell us it was too big and throw it in the back for us for free. No biggie, it just lead to an argument at the counter that didn't need to be an argument and a threat of a $75 charge.