I am not a big Gore fan it just does not seem to last long enough to warrant the price.
OK - it used to (still does?) come with a 2 year guarantee but if my memory serves this did not apply to proffessional users (which I was one of being an outdoor skills instructor) just "ordinary" users.
Ordinary users tend to wear waterproofs when out in leisure time - weekends and holidays say 160 days for 2 years worth of weekends and 54 days holiday
Oh - I bet they do not go out Sat and Sun every weekend - say just on saturdays - minus 52 days 108 left.
Does it rain everyday they go?
Let us say not perhaps 1 day in 4 - that leaves 27 days...
Oh do they walk for a full 24 hours per day? I doubt it say 6 hours per days walk in teeming rain - that gives you 162 hours - call that 6.5 days.
6.5 days worth of guaranteed performance over 2 years? At best four days worth of wear per year? The rest ot the time you would be a well off in a surplus smock?- Great value!
Just my take on it - the maths may not be perfect
