Friends delivered my boat from the PNW to Lebanon.
10 months...14,000 miles...three bladders...no problem at all.
The bladders were stowed in the bilge
and looked new at the end of the trip...no evidence of chafe (full keel
, no pounding
I don't recall
what the brand was as it was a long time ago (2003 to 2004) and I gave them away to a fellow cruiser who was stuck in Leb. during the 2006 "war" with holed main tanks
and only a small day tank.
They can be difficult to handle (when stowed in the bilge), especially when trying to refill your main tanks
through the deck