With regard to the booklets, from the context of people who know quite a lot it is not very good for sure, I agree on that, but if you take the time and sit down, it takes you through the screens and enough of the options. You get an idea on the basics which is the aim of it. Combined with forum info (vids etc.), see whether a basic course will still serve your demand.
e.g. creating a waypoint you really can get out of the booklet, even crappy one manage to be succesful at that. The one for the etrex 10 was not that bad. Still for the pure novice, some things are simply not explained enough.
I would focus on what you need, in other words, why did you buy, if you bullet that list I think the forum is able to make the most efficient link to where get the knowledge. On the other hand..lets not be too difficult, some people do not want to spend time investigating because of lack of time. A basic course will probably be a good thing thing and the initial question was whether the company is any good. To answer that, based on website, seems a yes, based on experience, no idea.