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Just a couple of things.
From the time I tested my RC this is what I noticed.
Stars were refractor like in that they were like little pinpoints of light. Certainly better than an SCT most of the time. As good as my 18" 0.95 strehl mirror and easily equal to my TSA102 refractor.
Contrast and image brightness was reduced remarkably from a Newtonian of the same size. You can use it for visual work but unless you are doing heaps of imaging then it is better to get something a bit faster and with less obstruction.
Can I say the vanes are not as Sab has suggested thicker than a Newtonian secondary. He might be thinking of a Vixen scopes. The vanes on the GSO RC's are pretty thin really.
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