I personally have an EBD-M05, in fact I bought it from that seller months ago (my review is there and says “Great! A user of this device told me its stock fan… ”). It's a nice small battery tester which supports testing up to 5A/30W. You can find some related information here: ZKE Tech EBD-M05 help. For the software download page for EB devices, tap/click here.
No testing device will tell you the discharge rate of a cell, they're just testing devices. The discharge rate of a cell is mainly determined bearing in mind a maximum allowable cell temperature during discharge, but also relative capacity loss and probably maximum allowable cell voltage drop. Most important is the maximum allowable cell temperature during discharge, being 80°C the usual maximum allowed in datasheets. Lower figures may also be used, tester Henrik now limits his tests to 75°C for example (since his battery holder melted from testing Samsung 30T cells at 40+A, if I'm not mistaken).
In my experience, the few discharge curves I've attained with my EBD-M05 look worse than the ones attained by Henrik. Device calibration and testing conditions matter, of course. Now that the climate is warmer around here, I may give testing to a Murata VTC5A cell I picked from a bag in storage just today for comparison purposes.