I've always worn IR because it looks more like my natural hair but I just got a CR light yaki from Holly last month and I must admit I LUV IT

The light yaki looks like the type of thick coarse hair I always wished I had back in high school. I can't pull it off as my own though so I just wear it on weekends to play with.
Pro's: very strong and thick hair shaft
takes color and highlights very well
looks good with a nice layer cut and loose curls
Cons: not as soft as IR (IMO)
does not hold curls nearly as well as IR (even when set)