The new Apple iOS 5.1 update is available today. The question is, should you bother to upgrade?

We've done it, and to the naked eye, there's no bells and whistles, just a stealth improvement in performance we'll notice over time.
Know Your Mobile says the iOS5.1 update will improve Siri on iPhone 4S, fix software bugs and boost battery life.

The update should stop the battery drain that iPhone 4S users have been want to complain about in forums, according to Softpedia. It's not yet known whether it's a fix for iPhone users complaining, or just a fix for the battery thing.

Definitely update now if you're Japanese. With iOS5.1, Siri now speaks Japanese, bringing it to six languages, or local accents - English, British English, Australian English, French, and German.

The full list of improvements will also include the following features:

There's two easy ways to update your OS to iOS5.1. There should be a red 1 on your settings icon if you're on iOS5. Hit that, and follow the instructions. Or plug your phone into your Mac, hit yes when it prompts you. Apple magic does the rest.