Why just to PBI? Is it the airport, the plane or the airline?
I've flown Delta MD-88s JAX-CVG, CVG-MKE, MKE-ATL, ATL-CLT, CLT-ATL, DTW-CVG, CVG-LGA and it wasn't too bad. This was all in Y, so nothing flash, but hey neither is a downtown bus, and these flights, while admittedly costing more than a local bus ride, are really not much more.
Of course, to aviation nuts like myself any opportunity to get into the air by any means is magic!