I'd recommend this album to almost anyone. It's scope is broad enough that most people would like the sounds of this album. This is my second favourite major Halo album, behind The Downward Spiral. (Major being: Pretty Hate Machine, Broken, Downward Spiral, The Fragile, and With Teeth). I'll talk about some of the songs.
Track 1 is an awsome Jazz/Piano/Progressive Rock type song, and makes an unbelievable introductory song. Track 2 is an excellent "industrial" metal song, one of my favourite NIN songs. Track 3 is typical NIN, think Downward Spiral meets The Fragile. Track 4 (you should have heard this on the radio) is essentially a dance tune, something a little new for NIN. Track 5 is very Downward Spiralish. Track 6 is a dreary, tedious song that inspires despair, but thats what it's supposed to do, I think, so it's a good song (sometimes I feel every day IS exactly the same). Track 7 has an interesting trippy drum beat, the lyrics are interesting to decypher. Track 8 (Only, the second single) is just great NIN, kind of remeniscent of Pretty Hate Machine in that its kinda Pop. Track 9 is more industrial Metal that inspires feelings of franticness, slightly tamer than Track 2. Track 10, one of my favourites that I think is overlooked, is themed along the lines of "Deep" or "Closer". Good ambient sounding song with some great bass. Track 11 is a noisy, distortion based song, not particularly noteworthy, but improved TENFOLD when I watched him do it live in the 2005 tour, great special live effects. Track 12 is just a synth/ambient sounding song, nothing special. Track 13 is an AMAZING song that ends the album perfectly. Unlike most albums (not his, I mean in general) that end weakly, this one ends on a great highnote, like The Downward Spiral with Hurt. This song is kind of muted for half of the duration, then comes alive when he says "What if everything around you isn't quite as it seems." Gives me goosebumbs. One of my favorite NIN songs.
I'd recommend this as a good starter album for someone looking to get into NIN, who likes pop and rock songs. For someone with a darker flare though, I'd recommend The Downward Spiral. For someone who likes older 80's stuff though, Pretty Hate Machine is the way to go. Also, if you like remixes, check out Halo 21 - Every Day is Exactly The Same.