It really comes down to your budget and what you are looking for. Fluance is not going to win any shoot out against Paradigm, Monitor Audio, PSB, etc but they are an entry level system for people with a small budget.
I never had the honor to audition them but I have done a lot of research on them. Overall, for what you are paying for, these may be a better bargain than a HTiB. From the reviews of many owners, they seem to sound pretty decent. Their biggest weakness from many owners' views is Fluance's center speaker. But for the price people paid for these? You can't really complain.