 This is our 3rd GL.  We have owned a 2007 GL450, a 2011 GL550 and now a 2015 GL450.  Each time we have test driven other vehicles and ended up back at the Mercedes dealer.                                                                                                                                                                                                                                                             PROs:                                                                                                                                                                                                                                                                                     Real 7 adult capacity - The back seat is a little of a climb but it can comfortably seat 2 reasonably sized adults for moderate distances.                                            Drives less "trucky" that the truck-based SUVs - This is a unibody and therefore is not built on a truck frame.  That allows for lower ride height and more stable feeling SUV with a lower lift height to put stuff in the back.                                                                                                                                                                                  Decent power and ride - This is a change from the old V8s and is a little more slow to respond when accelerating from a moderate pace (the old V8s were quicker) but it is still very reasonable for a vehicle this size.  It is also a great highway cruiser with comfortable seats and non-fatiguing driving position.                               Many safety gizmos available - Lane departure warning, front impact warning, blind spot monitoring, automatic high beams, headlights that follow the curves all make for a safer ride.                                                                                                                                                                                                                                                  Interior -  Although the electronics are not the best the interior is pretty darn nice.  Leather wrapped dash, doors, real wood and solid overall feel to the controls and buttons.                                                                                                                                                                                                                                                                    CONS:                                                                                                                                                                                                                                                                            Expensive to fix/maintain - MB is one of the more expensive models to maintain.  Just a fact.  New sets of brakes/rotors every 30-40K miles, general maintenance in the $300-$500 range and this isn't a cheap car to own.  Add in that it requires Premium Unleaded and this isn't a cheap vehicle                                             Transmission can range from smooth to harsh - Usually, it shifts very smoothly but every once in a while it will hard upshift/downshift.  All 3 I have owned have done this.  It never inspired confidence but I ran my last one to 144K miles and it was still going strong when I traded it.                                                             Electronics are only ok - Nothing overly exciting about the NAV or Command system as a whole.  It works but is a little clunky and low resolution.                 Summary:                                                                                                                                                                                                                                                                             Safe, comfortable vehicle that performs well and feels like a luxury vehicle.  Electronics are only okay and your wallet/pocketbook won't be thrilled but for some people that extra cost is worth it.