Is the G600 ED worth it over a standard 8x42?

The ED glass is the reason to choose it: it controls color fringing on bright edges better than standard glass. If you mostly view in good light at short range, a cheaper standard 8x42 will do the job.

How does it compare with a 10x42?

The 8x gives a wider field of view and steadier hand-held viewing, while a 10x42 shows more detail at long distance but shakes more and is dimmer in low light. For general birding and travel, 8x42 is the more forgiving choice.

Yes, the body is waterproof, so rain and damp conditions are not a problem. It is not rated for submersion, so do not drop it in water.

Expect the binoculars with lens caps, a strap and a carry case, which is the usual kit for this class. Check the listing for the exact accessories included.

Can I use it with glasses?

Twist-up eyecups are standard on this type of binocular and let glasses wearers set the right eye relief. Fold or twist the eyecups down before viewing with glasses on.

Is 8x42 good for stargazing?

It works for casual night-sky viewing thanks to the bright 42mm objectives, but dedicated astronomy binoculars with larger objectives show more. For daytime use it is the better all-rounder.