Apart from Miyuki who is smart, helpful and polite – though also somewhat clumsy – they are a dodgy-looking bunch!
For all that, the series is actually quite entertaining as a 'slice of life' type of scenario. Konata, the blue-haired one with an attitude, is lazy and prefers manga/anime and gaming to doing homework (but then, I suppose most schoolkids would) which is the excuse for introducing all those references from other series, such as the Haruhi Suzumiya references compilation video I posted here recently. There are plenty more, including Pokémon (which of course pleases me).
It's not something I intend to spend too much time on myself, though I expect to dip in on almost a random basis from time to time, as it is comparatively harmless. For example, the first episode is largely concerned with a discussion on how best to prepare and eat various foods. It's a lot more entertaining than any description I can give, so I'd suggest is worth pursuing if it sounds like it's your kind of thing.
Oh, there's a well done video of these ten doing 'Gangnam Style' – but I don't think I have the courage to embed it here(!)