Best Seller New Inventory List?

Best Seller New Inventory List?

I’m currently using CheddarSoft and I dont know if I just got a bad list but none of these list items ever work out for me? I’ve been using them for like year now and tried at least dozen items they suggested and none have been a hit or decent ROI?

Have any of you used any good New Inventory Lists? Meaning lists that have been vetted and proven to provide good ROI and performance for your FBA business?

THanks!