We get a lot of customers who have bought one and its failed within 6-12 months so they buy a better one.
My advice if you can afford it is buy a better one, we have the Stillen one in stock and have been selling them for over 5 years without a single failure.
We are a Stillen authorized UK dealer https://www.stillen.com/authorized-dealers , drop me a pm if I can help, we have cheaper options in stock too with a two year warranty
Cheers Chris