Its uneven at best on the PC, the PS3 is cumbersome at times and uneven would be a generous description (granted Sony finally fixed their online store so it was at least better than the Nintendo Wii shopping channel, but bleh), and it sucks outright on the Wii. You get what ya pay for, for the quality, they can have my 5 bucks a month.

That said, Netflix on the NXE is downright awesome. No lag, no crappy framerate, no mismatched audio. They must be downloading chinks ahead of time and caching to effect "streaming" like that, it was just like watching a DVD. Either its that good, or I have been lucky in the handful of things i have watched the last couple days.
Damn handy either way. Not sure how i feel about the rest of it, I quite liked the blades interface, was very intuitive.
The Mii-wanabes are cool enough, if not a little pointless. Maybe if some game in the future could leverage them they might be more interesting. That's my favorite part of the actual Miis on the Wii, you can use them in a fair number of games as your character.
Game installs seem pointless if I am to use the machine for any HD video. I guess we'll see how future games leverage that, I am hopeful "installs" will not ever be required, the PS3 does that to me, and its a downright pain in the ass. Pop disk in, go find a snack while it gets its **** together...