I had a SWWP AirBreeze up for a few months this past year. When the wind could get to it, it did surprisingly well. On several occasions I saw the rated output from it.
But I'm in a Really Lousy Area, right at the base of a hill (would need about 60 feet of tower just to get to the top of the hill, which is three suburban lots down from me!), lots of trees, and capping it all my city has banned turbines (safety concerns - the lots are too small to really put one up properly).
I sold the turbine to a friend who lives nearby, he put it atop one of his ham radio towers, and it now whirs merrily along. Except that it does have a tendency to stall itself out just when you are expecting lots of output (it doesn't furl, just electrically brakes itself in high winds). Be nice if it had a furling option so it would continue to produce in those higher winds, but no it just quits producing altogether.
For now I satisfy myself with solar power. 1080W of Kyocera panels on the roof, and an Outback Power system in the garage, feeding an 880AH @ 12V battery bank. Currently I have an inverter I plug the fridge into during outages, and run a few other things directly off the battery bank.
Soon as the new Outback inverter arrives (in a day or two!) I'll be switching over to a 48V bank and running some new circuits in the house. Many things will then be 24x7 wired to the inverter, so will automatically switch over to battery backup and be able to take better advantage of solar power during the day when the batteries are charged.