Tried 'em, gave 'em a good go. But in the end, those few extra notes just don't seem worth it to me considering the extra expense, weight and general inconvenience and faff. And yes, I know it's about fretting-hand positions as well, blah blah - but I just plain don't get on with fivers and way prefer four strings. Horses for courses, one man's meat, be a funny old world if we all, yadda yadda.