Spanair operation = good, very professional use them all the time on Spanish domestic services
MD83 = good
Quieter in flight than a B737-300/A320 or similar with the rear mounted engines except if you are in the last 4 rows
However Spanair also have the A320 and A321 so might turn out to be one of those
Spanair are also in Star Alliance
B717's are used by Ae Bal out of PMI, not Spanair mainline but a subsiduary and not used on Spanair charter services