The A-39 is a good coach. The all electric feature is not an issue. The differences as I see them are, no propane to deal with and the appliances are normal house types not special RV units. I am sure that there others but these are the ones that come to mind. The coach itself is well made and sits on a Freightliner chassis, a large company with many service locations. It has plenty of power for hills, 400 hp Cummins diesel. If you would like to review the owners manual it is available on line at the Airstream web site. Airstream, Inc :: Home
You said this is your first motor home. The only potential issue is one addressed by GlenCoombe earlier is that of a unit sitting on a lot for a long time. This is something you may want to address with the seller. Perhaps GlenCoombe can give you some hints as to what to look for.
The coach will give you many years of enjoyment. My wife and I have had our A-37 for almost 3 years now and are taking it to Alaska this summer. If you have any more questions let me know.