We use this rack while touring with our rack mixer and other gear: power conditioner, power supply bar, IEM units etc. It is perfect for our needs and it has proven to be very sturdy, especially during transportation in a car.
The wheels are perfectly placed to sustain everything. Considering that during transport we also deposited a lot of cables inside, adding some serious weight, it held up perfectly. The brakes really do their job, making the rack very stable, both on stage and during transportation.
The hardware is definitely not top notch, but considering the prince range, that was to be expected. Regardless, all elements do their intended job very well.
In my opinion, it's a very good budget choice, a perfect fit for normal usage, since it does the job very well, without any problems.