Thanks a lot Stef !
Once I got the RFP-747 for FS2002, but I was not really satisfied so never really flew that plane. I was very excited to download and install this edition. It is really good in functions, offers a lot more than a normal freeware, but not enough nice for a payware (or to me). I mean, if you look at the CLS screenshots you can see the cleanness of the panels: you do not need to search for click-spots and buttons, everything is clear and relatively easy to overview. While the RFP panel is not so coherent. There are many fashion of gages, buttons and lamps mixed together and it is quite hard to overview - that is a typical problem for me at freeware panels, that the "fashion" of items is not common.
Anyway it is not a glass cockpit and many automated systems of the -400 is presented here as manual. It is almost a completely new airplane and I had to learn a bit until I could take her off the ground. The sounds are unfamiliar too, but realistic (I guess): no engine screaming in the cockpit, only very quiet roaring

The visible model is quie good, but again in small details the CLS is better I think.
All in all, it is a nice looking freeware aircraft, but now I could not decide which to use: a more simple (?) but cleaner design for easier flying, or a very realistic model but a little messy design that is harder to use.
Regarding the new payware A380 of NLS, I checked the model from their screenshots, and again I reached to the same conclusion: the model is unreal in many details, which would annoy me while flying. But you cannot tell it to a modeler because he will be angry and kick you out together with your opinions. This annoys me, because there are so much sources available and they just cannot remake it perfectly, even though they do not listen to such critics, but eagerly waiting for the 50-100 bucks to get transferred.
