I bought one directly from apple with 16 ram and 1T storage. First I had to wait a month for delivery. Like others in this thread, bluetooth didn't work, wifi had major issues, and several other smaller issues. I decided to reinstall big sur but after I erased everything it wouldn't connect to WiFi again. (Must have wifi to install big sur). Thankfully I was still able to return it. I will be buying another one hoping this one was a pickle as I see most reviews are excellent. However, this time I'll be buying the cheapest option and buying a SanDisk for extra storage.I suggest anyone who find wifi or bluetooth issues from day one, return and replace the machine immediately before it's too late!