I still have the Aurora 1975 re-issue of the Flying Sub that I built when I was 15 and I recall no major problems assembling it, nor were any of the hull parts twisted or warped. In fact, I just plopped it next to my PC monitor. I thought the interior went together quite easily too. If I were to re-do the kit today, that would be limited to an exterior paint job - I'm still satsisfied with the interior cabin paint job that I did years ago. And a childhood buddy of mine, who was an absolute whiz at detail painting (Craig "Bismo" Power who moved to Winsor Ontario around 1976), did such an absoulutely awesome job of the Admiral Nelson and Captain Crane figures that I would put them up against the best work I've seen here.
I have a Monogram re-issue too, but its still unopened in the box so I can't comment on whether or not its parts are warped. Al in all, I think its a tres cool little model kit.
Huzz