I tried my first pair on a metric today. They're Bib Knickers. Weather was perfect for knickers with 47 degrees at the start warming to the high 60's.
I have knee warmers but with my long skinny legs they just don't make a pair of knee warmers that will stay in place long enough-I find that knee warmers are more trouble than they're worth so I've settled on knickers. My old pair of knickers was not bibs and since I "shrank" a little more this year they no longer are snug enough and tend to slide around.
I just got a pair of Bib Knickers because I couldn't find a pair of knickers without bibs from the brand I was looking for. After 6 years I've found one brand of shorts that seem to meet my comfort needs for really long rides and have given up on others. Thanks to Google, fortunately I was able to find last year's model in the brand I was needing and saved some big bucks.
Frankly I can't tell much difference in comfort between bibs and non-bibs. The biggest difference was the one time I needed to go to the bathroom and had to take off way too many clothes. I did like having the new chamois-I enjoyed and noticed the extra padding more than I expected. It did make me realize how much I'd worn out the chamois in my regular riding shorts.
So what is all the fuss about bibs??? I'm tempted to cut the darn straps off and get my daughter to put an elastic hem around the waist!!! I wonder if that will void the warranty!