I tried it a few weeks ago, because I was curious. DO NOT FLASH IT.
The ROM works just fine, but it's meant for GSM-only on the Butterfly/DNA. It won't connect to the Verizon network at all, even after modifying the radio settings and doing the *#*#4636#*#* dialer trick to default to CDMA. After you flash it, with any other subsequent ROM you flash afterwards, the radio will still be broken. The only solution to fix it is re-flash the stock recovery and stock radio again.
It probably wouldn't be *too* much work to modify the ROM to make it Verizon-compatible, but I haven't had time to look into it much. All I know is it won't work as is.
---------- Post added at 07:22 PM ---------- Previous post was at 07:12 PM ----------
I should also point out that MIUI for HTC devices is currently based on Android 4.2, so app performance isn't as good as it could be.
Once MIUI is re-based to 4.4, it should be easier to fix the GSM-defaulting issue as well, due to the OS improvements on that front.