Wow. The replies at the NS forum are incredibly arrogant. Pretty much everyone is saying "It sucks. NS is better", without giving any reasons. I doubt some of them actually tried it... Critic is perfectly fine, but not like that.
I'm not getting into this conversation other than that. Some years ago, I discovered NS, and wanted to try it, because it looked incredible. I never got it to work, though. Now I don't even have a copy of HL1 anymore. I might check it out if they'll get the Source version finished, but as it's now, I'd bet that it feels even older than Trem. (Which was one "reason" as to why NS>Trem)
edit: Made some parts slightly more friendly