I used this to export thumbnails and it works very well! It's quick and the nodes in the exported file come with all their textures attached, and it has virtually no learning curve. You just punch the corners of the area you want to export. The only complaint I would have is that it doesn't support .b3d files, which prevents it from being able to export certain kinds of nodes.
This is a nice step up from the Moretrains Japanese Train; though it's the same model, the MeseJet has a much more refined feel. The subdued colors in the interior, combined with the dark gray/yellow contrast, make this train much more luxurious. The tinted windows are a nice touch! I also like the line number displays on the interior.
The only minor complaints I would have are odd transparency issues; for example, when looking through the windows from the outside, the floor, seats, and some parts of the wall are missing, and I can see the tracks and wheels through them.
This mod is a HUGE step up from the default carts. Aside from having bigger, nicer-looking transportation, the trains can run automatically no matter where you are. I find this very usefull in creating large worlds where walking everywhere is extremely tedious to say the least. I can set up trains that run to various places, and getting where I need to go takes a fraction of the time.
It also includes advanced train control and signal systems so that you can have multiple trains running on the same stretch of track, while avoiding crashes. Also, when installed alongside the Mesecons mod, you get more features like detector rails, which can be used for making station lights, and also can be used for programming more complex train control systems (I have yet to dig into all that myself).
There's a slight learning curve for track placement and the signal system, but once you get the hang of it, it's logical and straightforward. Also, the trains look great!