[ciokan]

Other than web components not being fully supported yet by browsers is there any other downside to this compared to react+redux/vuejs or angular? I'm just asking as I haven't tried polymer until now but I'm pretty familiar with the mentioned fw's.

[euyyn]

For the browsers that don't fully support components yet, Polymer should take care of it for you.

[ergo14]

No downsides, I've been sucessfully using polymer on unsupported IE10 and in our use cases we haven't encountered a blocking issue.