I bought this chimney for my mom and thus far has been performing well. The installation engineer needed some training ( after touching ylthe on/off button, it does NOT switch off automatically but it is set to switch off after 3 mins) as he was not aware of the ops.
Also, the quality of the pipe etc coild be better. But remember, that does not take away anything feom the chimney itself. We can always insist on the best quality pipe etc.