This is one of Tilt's defining works, and the whole package shows the many different sides to their music.
The various mixes of Invisible are all great; the Tilt radio and full length vocal mixes are the best, with quite a bleepy sound but still surprisingly emotional. The Lost Tribe mix is classic Matt Darey, and uses his trademark smooth, euphoric sound. All these tracks feature vocals by Dominique Atkins from the much-missed Grace.
Rendezvous is the best track - it's the original version of Invisible but without the vocals. Again, this is a really emotional piece, which is surprising in club music.
I Dream and What's This are less accessible; the former is a reasonable piece of progressive trance, and the latter is very dark and shows the direction Tilt would take on their Dark Science EP, with its nagging acid melody line.
All in all, a great package; buy this and Maria Naylor's Angry Skies and you have all the essential Tilt material you'll need!