I'm growing 6 hashberry and 6 satori right now, and so far everything's gone very well. I can't say how the smoke is, since they're still seedlings, but I've heard nothing but good things about them. Here is a link to the icmag boards for Mandala Seeds:

International Cannagraphic Magazine Forums - Mandala Seeds

And here is a nice smoke report from Hashberry:

International Cannagraphic Magazine Forums - Mandala Seeds - Hashberry Grow Summary and Smoke Report

Mandala's seeds are nice because they use a lot of genetics that no one else does. If you're looking for something new and different, they're a good bet.