Although my experimentation with external catheters was relatively successful, I had to put it on hold when my urologist increased my intermittent self-catheterization. The presence of the external condom interfered with the intermittent catheterization and the latter was the priority.
One of the primary reasons for my experimentation with external catheters was to reduce the number of diapers I would need for a vacation aboard a cruise ship and to reduce the possibility of nighttime leaks.
As my wife and I have a Caribbean cruise planned in January (I won't name the cruise line until we are back), I will resume some limited testing of external catheters. Although I found the overall use of external catheters to be very successful, it was exceedingly difficult to remove the condom when I needed to wear it only overnight.

The adhesive was just too strong after only 7 - 8 hours of wear.
--John