[twistedanimator]

I've got the mid-2012 13" mbp as well and it has been great! I have the RAM maxed out to 16GB and replaced the CD drive with an internal SSD adapter. Now it has 1TB of space across two Samsung 850 Pro 512GB SSDs. It's still very fast!

With that said, I'm leaving it on El Capitan. Nothing in Sierra tempts me to upgrade and pay the price of configuring everything again and being left with worse performance. It's sad, I truly believe this is the last Apple laptop that I will purchase as they continue down a path of adding things I don't care about.