I'll add my 2 cents here too. I've had my 2 lbs. Sono about the same amount of time as jspain (15 mos.) and I agree, there are times I wish I had more capacity. I just bought the Sono sample roaster too so I could get an accurate representation of what the 2 pounder would produce with samples from importers.
This much is true from the Sono: I agree with jspain--it does an amazing job with naturals--great clarity of those varietal fruit notes--but definitely likes a harder bean. I've had trouble with some Brazils--it seems the profile is a little aggressive for some. Bottom line on the Sono: since we don't currently have profile control (and my hope for the Milowidget is all but gone) and Sono hasn't added it yet (though they admit now there is a market for it and are looking at it), you have to choose your coffees for the roaster, rather than adjust your profile for the coffee. It's a workaround, yes, but there are plenty of coffees out there that shine on the Sono.