The laptop would not boot up when I got it. It would let me get through a few steps of the setup process, then it would become unresponsive and eventually shut down, then restart, then freeze, then repeat, etc. etc. I talked to Apple Support and tried a few different restarts (NVRAM, SMC?), and tried re-installing the OS. None of that worked, so Apple Support concluded that there was probably a hardware issue. Very disappointing. I love Amazon, but they need to do better than this with their renewed electronics. I was so disappointed and frustrated with Amazon that I returned the laptop, and instead of just ordering a replacement from Amazon, I paid a few hundred extra for the same refurbished computer from Apple. I just don't have much confidence in Amazon's renewed program after this experience. I will say, however, that I'm very pleased with Amazon's return policy/process.*** Update:Previously, I said I was "very pleased with Amazon's return policy/process." I take this back. It has been almost two weeks since Amazon received the defective laptop I returned, and I *still* have not received my refund. This is outrageous. The return process was easy, but it absolutely should not take almost two weeks to get a refund for the large amount of almost $2,000 that I paid for a defective product.