I'm a member here for quite some time here and followed threads here but didn't post anything yet.

The DIY CNC virus has bitten me 10 years ago and since then I have been very active on the electronics side, especially stepper, BOB and servo drives.

All 3 designs where lihaijiang is referring to have been made by me.
These were tested beyond the chips limits and it didn't blow, this chip allows a performant low cost drive for DIY guys iso buying off the shelf drives, but it needs a good PCB design.
Do you intend to evaluate the chip using your own PCB design?

You can buy an evaluation PCB from lihaijiang or a "real" CNC drive from me at an evaluation price :-) .

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