Just an update on this - I've stopped using NO-Explode in the past month and have moved onto Superpump 250 after I heard people on here and in general raving about how good it was.
Been using it for nearly a month now and I don't rate it at all - hardly get any noticable pumps, (and it tastes foul) so it's back to the NO-Explode for me once this tub runs out.