Hi Fraser,
I have also used JB, TL XP, and varivas.
I have spliced them all to give a terminal loop, but JB is really easy since it is the only hollow line.
As far as casting goes
Varivas slightly better than JB, with JB alot better than XP
JB is a 'soft line' which tends to wind knots a bit, but not as bad varivas.
George