Not sure what you mean Kungfu.
Cant remember last time had a sick day and certainly not from 'polluted' water.
On day one of 4 days off. Finished on a nice short early an starting on a latish late so in effect really 5 days off.
Relaxed and not in the slightest fatigued.
Sorry dont mean to rain on your bbq but quite like 5 on 4 off and the water!
Ps as I said Ryanair is not perfect but if you got the 5 on 4 off roster and the base you want. No night stops, own bed every night and no crappy night flights (which I have done previously) its alright. Earliest start about 5 ish and last finish midnight. From my previous experience that gentlemans hours in my book.