It was actually remarkably good. Had much of the crunch of a fish finger sandwich (an old favourite of mine).
It got to be a trifle dull towards the end but I think that could be down to my attempt to be moderately frugal with butter (a small concession to the fact that I'd already had a dinner this evening).
I'm not sure it is quite on par with a crisp sandwich (I just checked Wikipedia to remind myself that the majority of HN readers probably know them as 'potato chips sandwiches').
With salad cream of course.