I've only seen the Skytrex
Victory, but on the basis of the instructions I gather the other ships in the range are done similarly.
The kit consists of a hull casting (beautiful), a few additional white metal detail castings (in this case the poop deck, the boats, and a framework-like part that represents the beams in the waist), a set of white metal spars, and a small photo-etched brass sheet containing the sails and "shroud-and-ratline" assemblies. The whole thing is surrounded by bubble-pack inside a sturdy box. I ordered mine over the web; it came in a reasonable amount of time in fine shape.
It looks to me like the kit would produce an excellent model for wargaming right out of the box. If I ever get around to it, I'll more likely do it for display purposes - and replace everything from the deck up. The masts and yards bend awfully easily (probably an advantage for wargamers). Making the sails out of brass was a clever idea; they have reef points etched in relief, and they can be shaped to look like they're full of wind. But there's no way to make them translucent. I've been playing around with the idea of making sails out of drafting vellum, or some other extremely thin, slightly translucent paper. (I don't want to be able to see through the sails. I do want them to show the effect of backlighting, which makes shapes behind the sail appear in silhouette on it.)
Using photo-etched brass for the shrouds and ratlines was also a neat idea, I think. (They even provided the lower futtock shrouds.) These aren't the finest photo-etched parts I've ever seen (the designer missed the opportunity to make the ratlines skinnier than the shrouds), but they're not bad. Again, the designer probably had the wargamer most in mind; the slightly-oversized brass shrouds and ratlines, super-glued to the white metal masts, probably would produce a model that could stand fairly rough handling on the gaming table. I'm inclined to think they'll look a little clumsy, but I don't want to pass judgment on them till I give them a try.
The biggest problem is those white metal masts and yards. (The lower yards have "furled" sails cast integrally with them; the photo-etched sheet only contains the topsails, topgallants, and headsails.) They're really, really soft, and each mast is molded in one piece from deck to truck. (The tops, crosstrees, etc. are kind of blobby.) My intention is to replace them with wood and/or brass.
The instructions are generic (I gather one sheet is used for all the kits), but pretty good. They offer some sensible advice about rigging the model and mounting it on a base, and there's a nice series of drawings illustrating the color schemes for the various nations at different dates.
All in all, it's a nice kit. I'd go so far, in fact, as to call it the fourth most realistic
Victory kit that's come to my attention - after Calder, Heller, and Revell (in that order). It beats either of the Airfix offerings, and certainly would form a better basis for a serious scale model than any of those expensive continental "plank-on-bulkhead" kits. Highly recommended.