My samples have arrived and Ill be doing a two day test on the 19th and a three day on the 123 July.
Ill let you know the results.
They are expensive at 7.50 each (I think) but you leave them on for the whole trip

. Seeing as my diving is usually a minimum of two days it works out only slightly more expensive than the £2.50 catheters i normally use. the advantage is apparently comfort and no problems with cold water shrinkage (if you know what I mean.
Whilst for your average dive I would imagine they would be considered too expensive I think they would still be a viable consideration on long dives where spending a few hours in a urine soaked under suit may be less than optimal. Ironically on all my dive where I am expecting 120min + run times I am about as hydrated as i can be so i end up peeing a half a dozen or more times during deco.
ATB
Mark Chase