Erlik,
Yeah, Indigo is slow, but consider that one guy is doing this for for free. Pretty much what Next Limit are trying to achieve with a whole team, and they want $1000 for it. ;)
And i honestly have a feeling that Indigo is going to surpass Maxwell at the end, both in quality and speed, if it haven´t done so already.

Ray,
To get a noise free image from Maxwell is close to impossible, and on a single machine, you´ll need to count a minimum of about a week or more even for the simplest scene. Most people over at the Maxwell forum rely on plugins like NeatImage and Noise Ninja to clear out some of the noise.

...unless you have a renderfarm at home, which would help out greatly. :)

Rudolf Herczog
Digital Artist
www.rochr.com