I have read not so good reviews about that particular model.
I run UV sterilization in my 145gal freshwater Oscar/Severum/Convicts tank. Clear water, one of my healthiest tank.
Please read the following article, a bit lengthy but worthy in information:
http://www.americanaquariumproducts....ilization.html
Not all models in the market work well. They are not expensive, considering you only need to replace the UV lamp every six months and carefully clean (holding against a pillow) the quartz sleeve (not all models have one) when that change takes place.
Benefits of UV, in my opinion, surpass it cost. Combine the lower wattage suitable for your tank and use (at different flow rates, different uses) with the highest possible turnover rate. Not hard to achieve, except for killing parasites.
Pepe
Santo Domingo