Look at what their total package is. If it is a Paramedic Model EMS system, then the Paramedics are always in the back and EMT's are always driving (that's how Richmond is). It gets very old having to be in the back for 14+ calls a shift. Uniforms can be a big issue. Make sure that they are provided for you. A hot topic in Richmond was they were going to start charging us to buy the pagers out of our pocket. Look at how the system is run. Will you have backup if you need it, or are you the lone medic with no help at all. Look at the condition of the ambulances, very hard to work well in poorly stocked or not well maintained units. You can also call the local labor board to see if anyone has made any complaints. Also check to see if the system uses system status managment (ie... they move you around to locations of probable calls as they are predicted by a computer that has years of run history in it). This can keep you moving most of your shift, when you could acctualy be in a station getting some rest. Hope this helps some.
RW