Well i had my first play with the trial version of Mudbox today, starting simple I decided to create a candle
Rendered in c4d and a little Post in PS, had fun with the SSS.
Very intuative clay modelling application developed by a team of 3 proffesional 3d artists, I picked this up and used it with results instantly, it uses very similar shortcuts to Maya and C4d. In my opinion this is far more user friendly than Z-Brush and I will be purchasing the full version.
Get on over to [link]
and download the trial, you'll be pleased you did.
Only issue im having at the moment is the lack of tutorials available although Digital Tutors are releasing some DVD's [link]