J, 1M is unbelievably. I wanted an E46M3, but couldn't love it, so decided on an E92 M3, still didn't. Drove many of them and just couldn't get into them, drove the 1M by chance and 5 minutes in, was wondering if they'd give me a discount if I put a deposit on the day. It was that good.
It has a face only a mother could love, but on the road it's a monster. Breaks traction all the way to third and if you just want to potter, it'll do that too. So for me it was the perfect car just to get around in, but hit a fast mountain pass, and it's vicious and incredibly entertaining. And it feels Old school raw... properly raw.
If you're seriously considering one, take one for a drive if possible, and I dare you to not buy it. If you want any more info, happy to have a chat.