It rattles and rattles

As a former smoker and passionate Bietrinker I have one hour daily cycle around my weight to keep at least. Since my office is little space, I decided for a Faltbike.
This exercise machine is built very fast and disappears in the smallest corner. He is unfolded stable and gives a solid impression. That's great and worthy alone is two points.

However, the bike seems to dissolve. My first copy was an unbalance in the flywheel to after about 10 days of training had the pedal boss apparently a way. It began to rattle with each revolution. A sound that made extremely nervous. Amazon exchanged the bike out without hesitation. The new power after the first training noises. The left pedal cracks at each contact and also the flywheel klacklert funny in front of it. Because I need a bike for my well-being and that cost only 99 euros, I keep it. I'm going but definitely times precaution ansschaffen replacement, since I do not believe that this part will last longer than half a year.