Hmmm, I have SPD’s on my touring bikes and tandems, SPD SL’s on my roadbike and eggies on my MTB’s.
I’ve done thousands upon thousands of miles on the tourer/tandems with SPD’s and even had a pair of XTR’s on my carbon roadie for a couple of months. Couldn’t really tell the difference apart from SPD SL is more buggeration to get into away from the lights.
If you have the £££’s, spend them on pukka road kit, it is nice. If not, you won’t die a horrible death just get the pi$$ taken by the roadies.
BTW, I had that last weeekend. Out on the road bike but with the MTB helmet (peak less of course) and some random fatty roadie wanabe took the pi$$. I politely told him to fek off 🙂