It's too early to give an opinion on reliability, but first impressions are that this is a quality piece of kit. The construction is considerably bigger and more robust than the replaced Screwfix inline fan. Although the peak power consumed is not high the rotor is large and gives lots of airflow - quite sufficient even on the low speed. No fan is going to be silent, but there is no issue here with noise. Very pleased so far - especially as it's much cheaper than the two big brand names who seem to get poor reviews anyway despite their costs. And excellent service from I-sells!