I've got it in my Bell Zephyr. It's cleverly integrated into that design though. I've not had another helmet with it before but I did try some with Mips added into older designs (like the Synthe) and the fit was a bit smaller as they need to retro fit the system into existing moulds.
I can't see a massive benefit to spending the extra for Mips if you're on the fence about it.
I've got it in my Bell Zephyr. It's cleverly integrated into that design though. I've not had another helmet with it before but I did try some with Mips added into older designs (like the Synthe) and the fit was a bit smaller as they need to retro fit the system into existing moulds.
I can't see a massive benefit to spending the extra for Mips if you're on the fence about it.