I bought this to upgrade my 2014 MacBook Pro 15.4 inch. I measured the SSD throughput on the original 512GB SSD and after the upgrade. On the original one, I was getting 600+MB/s. On the new one, I am getting 1,600MB/s. It is not the spec.ed 2,500MB/s but that could be due to my older Mac model.

Say what you will about Samsung and their phone devices but I have always had the most consistent performance with their NVME storage, super fast and a very good price point. Sure there are others that are cheaper or some that are technically faster but i feel like these have an amazing sweet spot...