I have the Prepar3D (Lockheed Martin) and Flight Simulator 2004 (Microsoft) versions, and it is fantastic. If you are looking for realism, this is the aircraft for you. The base package comes with both the 737-800 and 737-900 variants, with and without winglets. With the PMDG Operations Center, you can download and automatically install liveries for most of the major US and European liveries, nearly all configured according to their real world specifications (which you can change to suit your needs if you want), as well as install manually download liveries from other flight simulation sites. The Operations Center also allows you to download the latest updates as well as access to all manuals. READ the manuals, everything you need to know is in them, everything. It's a bit of a steep learning curve for those new to flight simulation, but well worth it. Unlike real world aircraft, you can make mistakes with this one (which imho helps to reinforce what you have learned).
You can also configure each aircraft from within the simulator using the Flight Management Computer (FMC) to suit whatever your flying needs are. From within the FMC, you also have access to payload settings, fuel amounts, ground connections such as generator and air starter, etc, even pushback from the gate. You can also program in any number of planned system failures you wish to experience, reset failed systems, cancel failures, etc. The entire flight plan (including SIDs, STARs, ILS and VOR approaches, etc) are programmed into the FMC and NOT the built in flight planner of sims, just like the real thing.
I never use the 2D cockpit, though I will use the overhead and radio 2D panels as needed because for me it is easier and quicker sometimes. However, the virtual 3D cockpit is fully functional, and you will definitely want to go over it in the manual to take full advantage of everything.
As with any addon for any flight simulator, there is a bit of a frame rate hit. Many of my settings are at or near full realism, so my typical frame rate on a mostly cloudy day is 20 fps inside the aircraft, and faster outside depending on the angle and what the aircraft is doing. It doesn't cause any stutter on my P3D machine, so it appears smooth enough for me. In FS9 on the same machine, frame rates are in the hundreds in clear weather, around 30-50 fps in stormy weather. Frame rates are easily adjusted from the simulator itself, so if you can adjust to what doesn't drive you crazy, lol.
There is simply no way in a review here, or even in the product description, that anyone can do this aircraft justice. Oh, before I forget, you can configured the aircraft for oceanic flights as well (ETOPS), for those up for a shorter range long haul flight or two. Everything is in the very comprehensive manuals, you should read them in full if you are new to this complex of an aircraft. Experienced virtual pilots (and even some real world ones) not familiar with the Boeing series will also want to read up in the relevant sections regarding where everything is and how exactly the FMC works.

Pmdg 737 Ngx Flight Crew Training Manual

Product information 'PMDG 737 NGX for FSX' The PMDG 737NGX features an unprecedented level of systems fidelity. Developed over three years with technical input from Boeing and a team of real-life 737NG crew and maintenance advisors, we have painstakingly modeled nearly every system on the real aircraft in a fully dynamic and realistic manner.

Pmdg 737 Ngx Release

1. Feb 20, 2017  Join me on stand 584 in Madrid (LEMD/MAD) as I show you how to setup the FMC using real world procedures on a simulated flight to Ibiza (LEIB/IBZ) The.
2. FS2Crew Panels. PMDG 737 NGX SPECIAL BUNDLE PACK - BUTTON. Opening and Closing the Main Panel. Main Panel Overview. Panel View Switcher. PMDG 737 NGX SPECIAL BUNDLE PACK - BUTTON. Forum Banners. PMDG 737 NGX SPECIAL BUNDLE PACK - BUTTON. Aerosoft Airbus X Series. Voice Control. General Requirements.