Initial thought:
Not worth the price being charged, so if you're looking for fun voices, try the other packs.
Voice Expansion Pack gives you 36 voices for a third of the cost. This gives you...6. And only three are really worth using.

The breakdown:
Underwater voice is literally just the user's voice with the Underwater filter that's already in the Effects list. This feels like lazy programming in my opinion.
Alien voice appears to be your voice played backwards, which is something you can do with [insert any free audio software]. However, having it for live use has its conveniences, so I can't fault this one much.
Cavern voice is actually not bad. It has a good echo effect and does resemble the sound of talking in a cave. Though you can easily just turn on the echo for any voice in the effects section and do the same.
Ghost voice is alright as well, but really resembles those voices from the Creatures of Darkness pack, making it seem like it should have been part of a free update rather than paying for it.
Telephone voice is not perfect, but I like this one. It's great for if you want to...well...sound like you're on the phone or a radio.
Radio Distortion voice sounds more like a broken radio or robot voice. Functional, but sounds awful unless you speak slowly and clearly.


Conclusion:
I enjoy MorphVOX, but feel a little ripped off after this particular purchase.
Some of these can be done yourself using the effects list and the price feels too high for only six new voices.
Would not recommend unless you just really like this sort of thing.

[b]Initial thought[/b]: Not worth the price being charged, so if you're looking for fun voices, try the other packs. Voice Expansion Pack gives you 36 voices for a third of the cost. This gives you...6. And only three are really worth using. [b]The breakdown[/b]: [u]Underwater[/u] voice is literally just the user's voice with the Underwater filter that's already in the Effects list. This feels like lazy programming in my opinion. [u]Alien[/u] voice appears to be your voice played backwards, which is something you can do with [insert any free audio software]. However, having it for live use has its conveniences, so I can't fault this one much. [u]Cavern[/u] voice is actually not bad. It has a good echo effect and does resemble the sound of talking in a cave. Though you can easily just turn on the echo for any voice in the effects section and do the same. [u]Ghost[/u] voice is alright as well, but really resembles those voices from the Creatures of Darkness pack, making it seem like it should have been part of a free update rather than paying for it. [u]Telephone[/u] voice is not perfect, but I like this one. It's great for if you want to...well...sound like you're on the phone or a radio. [u]Radio Distortion[/u] voice sounds more like a [i]broken[/i] radio or robot voice. Functional, but sounds awful unless you speak slowly and clearly. [b]Conclusion[/b]: I enjoy MorphVOX, but feel a little ripped off after this particular purchase. Some of these can be done yourself using the effects list and the price feels too high for only [i]six[/i] new voices. Would not recommend unless you just [i]really[/i] like this sort of thing.