Worth watching? Not really but they are definitely worth playing. It's hard to fault the anime adaptions because they have limited time compared to the 20 - 40 hours that some of the VNs take. Many of the other entries (Chaos;Child is great) are definitely worth it but won't really hit as well if you're just watching the adaption. The main reason being that VNs have multiple paths so they reveal information piece by piece. The adaptions generally try to include all of the information at once in a linear fashion but it doesn't really have the same effect.
I focused too much on the non-Steins;Gate works when I replied (as pointed out elsewhere) so to be clear, when I say "worth watching", I was referring to the "other animes" bit. Steins;Gate's adaptions are great! It's the other SciADV anime adaptions that aren't quite on the same level
