It also seems like you'd be able to fit more of them into the same space. The company also claims that they're (allegedly) cheaper to manufacture and are (allegedly) cheaper to maintain. Even if the efficiency is less than those of a traditional windmill, it would still make sense to use them from a cost savings perspective alone.

That's if everything the company claims is true. Too many other alternative energy companies have made similar claims and failed to follow through for me to take this with anything other than a grain of salt.

edited for clarity.