Millenium PD-669 Stage Double Bass Pedal

I'll just start by saying I'm a beginner.
This is a really good pedal, the feel is excellent for it's price. The pedal(s) are really heavy and sturdy. They sit nicely on the floor even with aggressive drumming.
It has a lot of areas that can be adjusted - a manual would come very handy.

The only downside to this pedal is that after a few rounds of kicking, the main beater became wobbly. It appears that the the mini screw that connects the beater body to the main rod of the pedal - this is quite hidden and you need to take the main beater aside to have access to it - was unscrewed.
Unfortunately the hex key (allen key) provided was just a bit smaller than the screw head so I could not screw it completely without damaging the screw head a bit (this I realised only when it was too late). So I used another allen key that fit well and managed to screw it all the way.

The pedal is very unbalanced. Of course it can never be perfectly balanced since the slave pedal must also drive the shaft. But with this particular double pedal, the left pedal is REALLY unbalanced.

It's perfectly good for beginners. For more advanced techniques, I cannot use it. Heel-toe for me is impossible because the pedals have a stopper, a dent if you will, at the toe part toward the chain and you can't help touching it when doing heel-toe, which makes it really uncomfortable.

But fir classical use, it's perfect and you can't ask more for the money