It's very different than I thought.
I'm incredibly glad that I've done it, but for different reasons than I thought when I was a pre-med. I've seen sides of medicine and medical education that I couldn't have predicted I'd see/enjoy/dislike as a pre-med. I'm very thankful to have had this opportunity.
I was terrified of medical school partly because I expected it to be a huge time drain, highly competitive, ridiculously stressful, impossibly difficult, etc. In my experience it wasn't really any of those. It has its moments of taking up a ton of your time, some things are really stressful and difficult, but overall it's a lot of fun. The people around you make it fun. And yeah I didn't honor everything and I wasn't AOA so maybe that's part of why it wasn't as hard as it could have been, but I did fine and still really enjoyed myself.
At this point (right before graduation) I'm doing a lot of looking back on my 4 years of medical school and I'm very happy that I've done it. It's really a great profession and medical school is a blast. It's terrifying up front, sure, and you should have a very healthy respect for what you're about to do, but it will all be ok and you'll come out the other end a better person for it... hopefully.