This is my third record of this type. The first 2 give me satisfaction. But the third turns making a lot of noise. This is worrying, vibrations are passed on to my lap! But otherwise, he seems for the moment to walk properly. No weaknesses noted by my hard disk monitoring software. Just too much noise while the other 2 are identical silent ... A drop in quality of assembly? I put 3 stars because of the noise, or I would give it 5 stars if it had been as silent as the other 2 ...