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Hi Richard,
The "Four-Reticle Red Dot Viewfinders" (pic attached) are very easy to use, and I now prefer them over conventional finders. But I have found the cheaper single-dot versions to be pretty useless.
They project a small red dot (or cross-hairs etc) onto a slightly tinted viewing window. You just nudge the scope until the dot coincides with the star through the viewing window.
The easiest part is that you still have your peripheral vision to see plenty of sky (rather than peering down a narrow finder), so initial target selection and rough alignment is very easy.
Cheers,
Jeff
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