I have a city (2005). The leather, while it seems soft and a bit thin, is durable. the bag is lightweight. the size is perfect proportion-wise for me. but I like to use outside pockets and on this bag both the outside zip pocket and the inside zip pocket are small.I have a bunch of Bal bags, both with the thin and thicker leather. I am not gentle with my bags and so far they have held up. But I rotate my bags at least twice a week. I agree about the Velo - my favorite Bal style! I haven't tried the Day yet, but I can see the comparisons to the Nikki. @Shelby33 did you try a Day?
will have to check Velo out. I keep looking at the posts about the various styles and then I forget which is which (except for city)