3/1/13 Build worked fine for me but I do have one of the older CPU's since all the kexec builds have worked for me, first boot time was only like 20 seconds and it still worked pretty quickly (but I only used it for about 10 minutes), seeing something different was refreshing and it took me about a minute to realize there was no lockscreen, most definitely a developer preview but it looks promising.Thanks Hashcode for the preview build and all the work you do, I'll keep testing them when they come out.
oh yeah the safestrap problem persisted for me as well had to hold the volume buttons to get back to Rom selection. No biggie
Verizon Galaxy S 4
Verizon Galaxy Note 10.1