Pros: good web site
Cons: little power
Check the web site at www.mariahpower.com - unless you are in an area with exceptional wind speeds the output is minimal.
At 5 m/s (12 mph) wind speed the puts out between 100 and 150 watts. Using the commercial capacity factor of approx 0.35 (say 150*8760*.35/1000) you may reach 500 kWh annual production.
The unit base price is about 6,000 USD plus what ever else is required. The projected annual income at 10 cents per unit would be 30 and 50 USD.
The economic calculator on the Mariah site ignores capacity factor which is used in all commercial turbine calculations - of course an engineer is involved there for a buyer where you may or may not have that advantage.
The unit is under testing at this time by the NREL (I believe it is NREL) to certify the capability of the design.