Topdon BT600 vs Midtronics vs sun Vat 45

I purchases this Topdon BT600 and used the unit the last month or so . Ive had a number of comebacks as far as batteries after this unit saying they were good but upon further testing as far as static discharge rate specific gravity along with load testing the battery to find that the batteries were bad. Ive also found comparing it to other battery testers this unit is just not a very good tester even though it does a graph for A/c ripple test and have a printer it does no good when it say the battery is good when it's really bad. l find it aggravating that it only displays the voltage during testing and startup of the unit and at no other time it will not specify voltage. There is no in the car or out of the car , top post or side post testing . the unit might need updated but I don't feel after buying the unit and it being new that I would have to update it straight out of the box especially just to test a battery. I'm sure that I can find more things to rant about but these are just a few things that bothered me about this unit and finding that it does not test batteries correctly 100% of the time . I hope this helps people having seen this review for this product. I thought this was a good unit after seeing a number of reviews that top Don had sent a number of people units to review . I personally don't find this to be professional quality but that's just my opinion. I hope you guys enjoy the video and that I didn't hurt feelings LOL.