Not to the Exclusion to every thing else.. [ I have a Dana Design Blaze (made 30 years ago) FWIW, & a dry bag, and a portage pack, bigger yet.]
OK, for you... personal anecdote noted..
but I take my panniers in to be filled with groceries, or the front bag on my Brompton, off when its locked up on the street..
Bike Courier bag is useful, and yes I have a back pack I use a lot. but not as easy getting 2 big bags on the bike.. its all useful ..
why dis other ones than your backpack ..? what does that get you?
....
Last edited by fietsbob; 12-16-17 at 09:47 PM.