Anyone use one for a Summer TQ and if so...what is the lowest you would use it ?

i wanna cover all my options ... i know what i will get with 2.5oz CL
and pretty much know what i will get with IX

but i wanna know more about the JRB fleece quilt liner
i figure i would ask since there only $30 might be a good option in place of a IX or CL summer TQ