I periodically come back to re-read this excellently written review.
One of the most competently and 'cleanly' authored scope reviews I have read - should be a template to be emulated!
With regard to the Vixen ED100, others have evaluated it in side-by-side comparison to top-line APO's of equivalent aperture - giving it in-effect a 90%-of-best rating as this reviewer has done. I own this scope myself and consider it excellent in optical quality - and value.