Max,
I'm glad you've found us. Welcome.
Like Riff Raff said, most of the "bad" stuff that you have heard about the VX is true. The rear seat is VERY difficult to get into, but once you're back there it's actually very roomy. There is another thread on the site regarding some seat extenders which push the rear seat forward a few inches giving you more room to get to the back seat. I don't have kids, but I can't imagine trying to get a little one into a child seat back there. If it's an occassional thing I'm sure it would be tolerable.
The rear visibility is limited, but this is something that most of us have gotten used to. Some members have installed rear view camera's that feed to a video head unit, or a rear view mirror with a small screen in it.
The gas milage could be considered bad by today's standards. Members get a wide variety of milage from 13mpg up to 20 to 22mpg.
Even with all of that said I've used my VX as a daily driver for the past four years and I have LOVED every day of it. Besides regular maintenance (oil changes, fluid changes, belt changes) I haven't had any issues with the VX. Ten years after it was built it still gets looks, and people are always asking if it's a new model. I wouldn't drive anything else.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless