Answered easily - they offer good value for the money (at least the pair I heard at AXPONA a few years back).
Are they the last word in fidelity? No, but they certainly weren't bad.
Do they have a family 'sound' characteristic? I don't know since they seem to have way too many models and I've not heard them. But, it does look like many share the same drivers so I imagine there is some common sound element.
Would I buy them? Nope. I found the sound to be somewhat 'generic'.