I have it, rather sturdy from the box, except for vertical wheel movement (pulling on the wheel), but I have solved that by implementing 2 metal rods that additionally connect front and rear end (diagonally), now it's fully solid and I think would even support stronger wheels.
The seat is great (I have the more expensive seat), comfy even for longer sessions.
The standard shifter mount not v2 that they sell now has a problem as it pokes you in the knee, but If you grab the newer version there shouldn't be any problems (I solved my v1 shifter mount by reversing the mounting).
All in all, really happy and would buy again, especially for that price.