Bit surprised at some of the comments regarding speedline.
While its probably correct these models are not for the novice builder, I dont see them as being just for 'expert' builders either. If you've built a couple of decent models and have an eye for detail, they shouldnt be beyond most people.
And, there are instructions available for some of the kits. OK not blow by blow instructions but then again, not all MSW (who make excellent kits too) kits come with blow by blow instructions either.
The 16th severn has instructions which are available on the site as does the Tamar.