I cruised over Halloween week with a large hosted singles group. While I pretty quickly figured out that the hosted-singles thing wasn't my cup of tea, I was entirely pleased with the Bliss, and with NCL in general.
The ship itself is absolutely beautiful. It rarely felt crowded, except for a few times when trying to get an elevator right after a show let out, but that's just the nature of a megaship. Otherwise, I could always find a lounger or a seat at the bar.
The cabins are well-laid out, with three (!) outlets at the vanity of our balcony cabin, instead of one as on the older Jewel-class ships. The closet had a hanging rod & some open shelving. Could have used a little more drawer storage space (there's only the two drawers under the sofa,) but we made it work.
Cabin was pristine, and reasonably well laid out. Shelves, not drawers, in the closet area. Could have used a little more storage in the bathroom, too; but the shower was a bit bigger than I expected.