High quality product at reasonable price. Both battery case and rack are preciselly made and assembled. My electric bike conversion (using TSDZ2 kit) is not finished yet so I can't say anything about battery performance. Battery weight is 5.6kg and the rack weights 900g. The only flaw I found is back light mount which is welded at to high angle. If you mount back light there, you won't be able to pull out and put back a battery. Special tools were needed to bend this mount downwards without breaking or separating it from the rack. Hoping that manufacturer and seller will offer very same separate (without rack) battery for those who want to buy second battery. The package arrived very fast not counting Christmas holidays. Highly recommended item and seller.
Looks solid! tested with my friend's motor-wheel: it works!