The treadmill has been in my possession for two days. In terms of construction, it seems sturdy. The walking is comfortable as it has a large length and width of the carpet. I bought it for fast walking, but at the 16km speed, it easily allows for intense running. I haven't run yet, but during the fast walking I do (5-7km), the machine is very stable. In terms of sound, during walking you can only hear the rolling of the carpet, while at 16km, when I tried it, you can also hear the motor, but not annoyingly. I have been to gyms with more noise. The controls on the arms for speed and incline are extremely convenient. It has a USB and MP3 port and speakers, something that I wasn't interested in because I have a TV in front of the treadmill, but it's good for someone who wants to connect their phone or tablet. Heart rate, calories, etc. are better monitored with an activity watch, as these indicators are not so reliable on these machines, but for a general idea, they are quite good. Folding is very easy. Overall, I am satisfied with my choice because I don't see myself going back to the gym soon and this treadmill has nothing to envy from the gym. In conclusion, if you are considering it, this machine is excellent for the price (450.00). I will come back with an update after more use.