Cheat death? If you're asking if I could die and... un-die myself? I don't know, and I don't want to find out. I suspect probably not, I haven't been able to use the chronal accelerator when I was unconscious. I've been badly hurt and been able to jump back to before it happened, though, which stops it from happening.
If there wasn't risk and excitement in time travel, I'm not sure where you could even expect to find it! It sounds completely brilliant.