Product review (2 stars): Bought two units: two use cases, one died, the other one survived.
Bought this back in 2012, lasted about 2.5 years and then the motor gave out. By then the warranty had ran out and luckily my Amex covered extended warranty on purchases such as this, so I was able to get a different unit replaced.
While it worked - it was great. All the asian stir fry and this thing was able to suck it all up. However it was insanely loud.  My sister purchased the same model and it still works. I broke mine because I use it on high setting. She rarely uses it past medium. The long and short of it, if you need this to do a mediocre job, it won't break down and should work for a long time. If you need it to go max power and suck up a lot of the cooking smells, then it'll vastly shorten it's lifespan.