Another suit has been filed against Apple over Siri, the voice-activated personal assistant software that was one of the key selling points of the iPhone 4S. The suit accuses Apple of falsely advertising Siri’s capabilities and functionality.

The class action suit was filed in U.S. District Court in Los Angeles by David Jones, according to the L.A. Times. The complaint alleges that Apple’s marketing of Siri is “deceptive.” Apple’s commercials show Siri responding quickly and flawlessly to a wide variety of user requests. Jones, however, found that Siri often took too long to return inaccurate responses, and often didn’t respond at all. Jones is asking for unspecified “relief and damages.” The suit seeks class-action status, which means that other disgruntled iPhone 4S users could try for a piece of the pie as well.

This is the second lawsuit concerning Siri to be filed this month. Two weeks ago another annoyed iPhone user filed suit against Apple in U.S. District Court in New York. Like Jones’s suit, that suit sought class-action status and accuses Apple of misrepresenting Siri’s actual performance and capabilities in its advertising.

For reference, here are a couple of the commercials:

Though not perfect, Siri is actually pretty popular with users. A recent study found that most iPhone users like Siri, though they use it for a fairly limited number of things.

The problem with suits like this, though, is that Siri isn’t meant to be perfect, at least not yet. Apple has clearly stated on a number of occasions – including on their website – that Siri is still in beta. Yes, Apple’s commercials show Siri working without the flaws that some users have experienced, but the truth is that when Siri works, it works pretty much how Apple says it will, which isn’t bad for a feature that’s still in beta.

What do you think? Should Apple have to pay people who are upset about Siri? Is Apple’s advertising “deceptive”? What do you think of Siri? Does it work like you think it should, or do you have problems (or both)? Let us know in the comments.