South facility attempted multiple times to charge my DA40 (small single engine) $200 for facility fee with a waived fuel amount of 75 gallons. I do not have a 75 gallon capacity, and resolving that took hours before I could get back on the road.

Go to the north facility if you park here. $37 per night single engine piston. $30 handling $10 convenience fee.

Flew into Modern Aviation South at KISP recently for Pilots and Paws mission, to pickup a pup to fly them to their furever home. Friendly customer service rep and marshaler. I called ahead to confirm fees and if they could be waived. Took a day to get a confirmed answer but they were agreeable - thanks! Light staffing but helpful service for the quick turn. I would go into Modern Aviation South again, hoping for another good experience.

Returned to the fbo at the time I gave them: 7 pm. Doors locked. No one in view. Finally got the attention of someone from the flight school who permitted me inside. No one at the fbo desk. No one anywhere. Got the attention of another pilot out by the planes so he could unlock the door to the tarmac so my family and I could go home. I'm sure they'll send the invoice for their services in the mail.

Good service and a fine facility. Make sure you ask which FBO to go to, there is a "Modern North" and "Modern South" and it's not shown on any of the charts.

Stopped by today in my humble Cessna 172 for a fuel stop. Two linemen were waiting to guide me in. Very friendly. The man at the counter ( Steve I think) was just as courteous and kind. I would most definitely recommend Modern Aviation without hesitation.