Flew an -88 for years with 116 seats (2X2). Now that was sweeeeeeeeeet!!!!!!!The MD is as safe as any airliner flying today (especially if you back out the AK jackscrew accident/gross negligence...the same thing woulda happened to ANY plane if neglected as severely and for as long).
Those seats by the engines, however, are THE worst seats in the industry, bar none. ANY RJ is vastly superior from a comfort perspective. That said, the rest of the MD cabin is one of the best rides in the industry. Very few middle seats and (other than the seats mentioned) a very, very quiet tube.