I have a lot of yellow opalino because years ago when opal yellow became popular I thought this was what everyone was talking about...
I used to make copper-silver-yellow opalino stringer--creates cool organic greens.
Intense black webbing is interesting when it's a base glass.
In my hands it is much like CIM ghee. One becomes slightly more opaque, but I don't remember which one.
Also tried it with Romance frit recently and I like that pretty well when etched.
I've never had any cracking issues. I guess my batch is about 8 years old.