Thought I'd add my 2cents as well

Been using my bike for commuting and running errands for about 1.5 year now.
I've experiemented with various panniers, trunk bags, backpacks, etc. The panniers were the best overall, but were a pain to deal with once I reached my destination (can't leave them behind due to possible theft, often unwieldly to carry, or very expensive for the well-designed ones)

About 2 weeks ago I decided to try out the (black) Wald folding baskets on my rear rack, and now I'm done experimenting. I've found my best solution. I wish I had tried these a LONG time ago.

They're always there whenever the need arises, and they sure hold more volume than I expected.
I just drop my messenger bag sideways into the basket and ride to work. If I need to pick up dinner or groceries on the way home, I just unfurl basket #2 and drop the bag in there.
And they're virtually silent unless my bike hits a good-sized rut or bump in the road.
I like the black version since they tend to disappear next to my black rack.

Definitely a thumbs-up