nothing to write home about

[Ivo]

Would you tell me your opinion concerning the interpretation of the expressions in bold in the following sentences?

The dog was nothing to write home about, a cross between a ne’er-do-well heeler and a dingo… (K. S. Pritchard, “’N’Coola and Other Stories”)

nothing to write home about = nothing especially, nothing remarkable, there is nothing to our credit

“Your mother is very kind, Dorothy. She’s asked us to dinner – I mean, to lunch – tomorrow.

“So what? Our grub is nothing to write home about”.

“Oh, it’s not that…. I just appreciate the thought.” (A. J. Cronin, “The Northern Light”)

A few tables were occupied and he considered the noise [b]nothing to write home[/b] about. (A. Sillitoe, “Saturday Night and Sunday Morning” (the noise is unbearable)

Thanks for your efforts.