We’ve taken up this topic several times in this forum. I’ll briefly summarize my own personal opinions on it; in the unlikely event that anybody wants to read my earlier, longer rants on the subject, I’ve put a couple of links below. Maybe some folks who hold other views will join in.
If you’re interested in scale ship modeling three companies with wide distribution make a genuine effort to appeal to your interests: Model Shipways, Bluejacket, and Caldercraft (also known as Jotika). They understand what scale modeling is about, and their kits are designed to produce scale replicas of actual ships.
There’s considerable variety in the products of the other firms Old Macdonald mentioned; I don’t want to over-generalize. I’ve seen good models built from some of them - by skilled modelers who modified the kits almost beyond recognition. But in general those companies seem to have something other than scale fidelity as their highest priority. I can’t claim to have seen all of their kits by any stretch of the imagination; I’ve never bought one (and have no intention of doing so). But the ones I have seen are characterized by utter lack of historical research, poorly-chosen materials, grossly inaccurate and un-detailed plans, irrational construction methods, poor fit, crude, out-of-scale fittings, and hideous prices.
There seems to be a big market for these things, especially in Continental Europe. Many of the people who buy them, it seems, are interested in producing decorations for their houses first and scale models second (if that). I don’t quarrel with those people’s right to pursue whatever hobby they most enjoy, but I do take issue with manufacturers who pretend they’re producing scale model kits when they are in fact producing something else. Sometimes I wonder whether the people running those companies know what a scale model is.
Bluejacket and Model Shipways have been in business for a long time; Calder is a relatively new firm, but is making quite an impression on the scale ship modeling community. Any firm’s products vary in quality. Some kits from a given company are noticeably superior in design, detail, and accuracy to others from the same company. But if you buy a kit from one of those three you can be assured that it represents a genuine effort to produce a scale model.
In previous forum discussions several people have raised other arguments on this subject - and those views certainly deserve as much attention as mine do. Here are links to two earlier threads:
www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=34574
www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=18901
Good luck. It’s a great hobby.