Bizarre Guitar is also an oddity among Spectrasonics libraries: it's not dedicated primarily to loops, but the last section of the library includes loops that makes use of a format that the company calls "Groove Control", a custom looping technique that improvises to different tempos instead of needing to manually adjust pitch to change tempo like with older loops. This Groove Control was taken to its limits later on with their Stylus and Stylus RMX VST's, the latter offering expansions that included some of the material from this section of the CD.
While the rest is recycled almost in its entirety in Omnisphere, it's still worth use on its own for reference of early 2000s soundtracks especially. Its sounds, while often used to death in that area, were amazing for their time.