Fun fact: due to a game I purchased on Steam a few months back (Flatout Ultimate Carnage) I had to install Windows Live, or whatever they call it, on Saturday.
No complaints, honestly. It's decent software right now. I didn't check memory usage, but it's currently pretty decently thought out. I want a way to turn off it telling me my "friends" are online (as most of my friends are people I played a round of Halo 3 or MW with that were intelligent and used some teamwork, enough that I'd friend them and seek them out, but should prune them off the list after years of not talking to them), but the achievements are well done, and I like the integration with XBL and, as I'm pretty intrigued by WP7, the integration there.
I'll never buy anything over it, as I prefer to make it easier on myself and use one service, but Windows Live, Windows for PC, Games for Windows, whatever they call it, wasn't nearly as bad as it's made out to be. I wonder if, similar to Vista, had it been launched at a better time, and had it been free at launch like it is now, it would have been reviled as much. Still, if you don't use XBL and you have no interest in WP7 the thing that I find most interesting about it is utterly lost and it's simply another service in an area full of services that love sitting resident in your RAM.
Curious to know if the people that hate it have used it lately, and what they hate about it (other than it exists.) Seems to me to be better than its competitors that aren't Steam. Again, I had such incredibly low expectations (as mentioned, I bought the game a month or two ago not realizing it needed this installed, didn't play till now because I avoided the installation) and it... wasn't terrible.
Flatout also had Xbox buttons in the interface. Fortunately I discovered that when the menu says "Press B" you literally can press "b." It took me forever to figure out what the reset car button was (you can't access the control menu in-game), but it turns out it's R. Which makes sense, but it was early in my usage of the game and I thought controls were mapped 1-1, so that every feature on the console that uses button X would use whatever it was mapped to here. It wasn't that dumb. Close, but not quite.
Worst part of the experience, though? The awful soundtrack in that game. How are we not yet at a point where we can just put our own MP3s to replace terrible licensed music? The original Xbox promised this, and very loosely delivered (very.)