I bought it for 32 euros, I didn't have high expectations.
I was hoping that the pedals would have a medium resistance, but they are mild.
I was interested in a twenty-minute exercise to increase my heart rate to 120 beats per minute, but the low resistance makes it difficult.
You have to pedal very fast to reach 100.
Nevertheless, it is decent.
It costs 10 souvlakia and does not make you gain weight.

It is exactly what you see, okay the resistance is not ideal, but for people with mobility problems it is fine. What I want to emphasize is that if you calculate it for under the desk, you should also consider your height. I, at 1.59, cannot fit to pedal while working!

It creaks quite a bit, but it's worth the money. After 30-35 minutes, you need to readjust the resistance a bit as well. For 30-50 minutes a day, it's very good

Well, first of all, for the money, it's perfect. Don't expect it to be comparable to a gym exercise bike at this price. It's compact and fits anywhere in the house. It has a valve to adjust the resistance and assembly is relatively easy. It's good to place it against something because sometimes it slips a little.
As for the negatives, I also mention that the pedals are not completely stable.

Good for its price, the only negative thing is that it slips and you have to counterbalance it against something stable (e.g. a wall).

Very practical and quite sturdy, the only issue is that the resistance is low and even though the valve adjusts it, after a while it loses and loosens the pedal