They a pretty darn good value for what they are. I've spent a lot of time looking into these and I've concluded it isn't really portable which is important to someone who lives in Sydney and needs to travel to darker skies for a better visual experience.
Furthermore, the size of the ladder required due to the eyepiece location also needs to be factored in for travelling with it. With the 18" non-goto you can get by with a short step stool. One of our club members has one. The 20" goto dob telescope is collapsible perhaps, or should I say dismantlable, but what about the ladder you require to actually use the thing.
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