Any real commercial pilots had a go of the PMDG 738 aircraft available for FSX, I am wondering how it appears to fair up to the real aircraft in terms of instrumentation?
The flight instruments are mostly very accurate. I have it exactly configured for my airline's customer options. As such I use it occasionally to prepare for some sim sessions. It was particularly useful for preparing for Cat C airport qualification sims.
Sorry to rain on your parade, but ....
I doubt many commercial pilots waste their time with PC simulators that on the whole are not at all an accurate representation of the real thing and also don't come anything near to what you get in the multi-million training sims.
It need not be a waste of time. The problem is real sim time is so short and tight, I can't afford to turn up and not know everything. There is no training really, just checking what you know. Armchair flying is powerful, but running through scenarios on my desktop can help me consider otherwise unconsidered complications to the plan.
NGX, is accurate enough. For example, it is interesting to fail a bus, get the FCOM out and look at the impact of the failure and then get the QRH out and start working through each individual light. I would not trust it as is, but it gets you thinking!
The specific problem with FSX is the amount of time it takes to work out how to get the most out of it. Unlike more specific and dedicated training tools like Elite, Aerosim, RANT, etc, FSX is fiddly and finicky and clearly not designed with training in mind.