I honestly can't remember the last time I used any other line than Gardner Pro in light or dark, it must be since Gardner released it!
Richard Gardner sent me a spool for an honest appraisal so I attempted to test it to destruction. The line held up better than I did.
My casting at Nazeing could be anything up to 150metres, 15lb Pro does it, with or without shock leaders, and a 3.5oz lead on a 3.25lb tc rod.
The line diameter is consistent, 0.35 for the 15lb. The only thing is that the breaking strain exceeds the stated strain, I seem to recall it was 18lb in tests with a balance and scales, using a Uni or Blood knot.
Bracken is a weedy water, or in 1 swim I fished, the line dealt with that while playing fish through it, and I never had it give up around the snags.